Key to Keeping Beautiful Leather: The Science of Oil Maintenance
Proper maintenance is essential to keeping your precious leather products in good condition for a long time. Oil maintenance, which brings out the original appeal of leather and beautifully promotes changes over time, can be said to be the core of leather care. In this article, we will thoroughly explain everything from the scientific reasons for using oil for leather maintenance to the optimal care methods for leather types, as well as practical maintenance procedures.
By maximizing the changes in age, one of the charms of genuine leather, and acquiring the knowledge and skills to use it for a long time, you will be able to extend the lifespan of your leather items and continue using them with a deeper attachment.
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1. The relationship between the scientific structure of leather and oil
To understand the essence of leather, it is important to know its scientific structure. Leather is not just a material, it can be said to be a living material with complex fiber structures and unique characteristics. Here we will explain from a scientific perspective the basic structure of leather and why oil is effective in leather maintenance.
Leather Structure: Collagen Fiber Network
The main ingredient in leather is collagen fiber. These fibers intertwined three-dimensionally to form a strong yet flexible network structure. Common leathers combine this fiber structure in a dense way to achieve strength and durability.
Observing it under a microscope, the leather fibers are bundled together, and there is a fine space between these bundles. This space serves to retain oil and moisture. For leather to maintain flexibility, it is essential that there is a moderate amount of oil in these spaces.
Characteristics of leather fiber structure
- Three-dimensional network of collagen fibers
- Fine spaces between fiber bundles (reservoirs of oil and moisture)
- Stabilizing fibers with tannins and other tanning agents
- Two-layer structure of the surface layer (grain layer) and the inner layer (corium layer)
The scientific mechanism of drying leather
- Natural oil evaporation over time
- Oxidation of oils due to contact with oxygen in the air
- Molecular structure changes due to ultraviolet rays
- Oil transfer between fibers due to temperature changes
- Moisture loss due to reduced humidity
Why does leather dry: oil loss process
New leather products are rich in oil added during the tanning process. However, over time, these oils gradually disappear for the following reasons:
- evaporation: Light oils in particular evaporate naturally over time
- Oxidation:Reacts with oxygen in the air and changes the chemical structure of the oil.
- Physical friction: Friction caused by use will cause loss of surface oil
- Environmental factors: Especially dry and high temperature environments accelerate oil loss
This loss of oil causes the collagen fibers to lose lubricity and the fibers begin to bond strongly. This condition can cause the leather to harden and crack.
Scientific effects of oil on leather
This is where the importance of leather oils becomes clear. Applying the appropriate oil to the leather provides the following scientific benefits:
Lubrication effect between fibers
The oil penetrates between the collagen fibers, preventing the fibers from being overly attached. This maintains the leather's flexibility and reduces resistance to movement. This effect is especially trueTravel bagorBackpackIt is important for products that frequently cause bending and stretching.
Moisture retention effect
The oil forms a barrier layer that prevents moisture inside the leather from evaporating. Moderate moisture is essential to maintaining the elasticity of the leather, and excessive drying can cause fibers to become brittle and cracks. especiallyBusiness bagThis is important for products that need to maintain their shape for a long period of time, such as:
Formation of a protective barrier
The oil applied to the surface forms a protective barrier at the fine molecular level, preventing the invasion of moisture and dirt from the outside. It also reduces deterioration caused by ultraviolet rays.Travel bagThis is a particularly important effect for products that are often used outdoors, such as those that are often used outdoors.
Reinforced fiber structure
Suitable oils penetrate the leather fibers and have the effect of reinforcing the fibers themselves. This improves resistance to friction and tension, and increases the life of the product. Frequently usedCrossbody bagIt is particularly effective for such things.
Oil molecule penetration mechanism
The penetration of leather oil molecules into the leather varies depending on their size. Light oils with small molecules (e.g., Natesfoot oil) are prone to penetration deep into the leather, while heavy oils with large molecules (e.g., mink oil) mainly stay near the surface and form a protective layer. Choosing the right oil depending on the type and condition of the leather is key to effective maintenance.
2. How to maintain oil for leather type
Just as not all leathers are the same, the oil maintenance method suitable for each type of leather is also different. Here we will explain in detail the characteristics of each of the most common leather species and the optimal care methods.
Full grain leather maintenance
Full grain leather is the finest leather that includes the top layer of the animal's skin. It has the original texture and strength of the leather, and with proper care, you can enjoy beautiful changes over time.
Characteristics of full grain leather
- It retains the natural texture and pattern of the animal's skin
- It has a beautiful property that changes over time with use
- Can be used for long periods with proper care
- Relatively sensitive to water and dirt
Choosing the best oil
Leather oils made mainly of natural ingredients are the best. Products containing Natesfoot oil, mink oil and natural waxes are good options. If you have dark leather, choose a colourless or similar oil.
Apply frequency and method
Generally, it is recommended to do this once every 3-4 months. It is okay to shorten the interval if it is used frequently or in dry environments. Remove oil on a soft cloth and apply evenly and thinly over the entire leather.
Things to note
After applying oil, be sure to dry it for more than a day and avoid direct sunlight. Untreated leather may become darker on the first oiling, so we recommend testing it on inconspicuous areas.
Full grain leatherBusiness bagorShoulder bagRegular oil care will make your body look more beautiful over time, and the more you use it, the deeper the flavor will become.
Crazy Horse Leather Maintenance
Crazy Horse Leatheris leather that has been surface treated with special waxes and oils, and is characterized by its "pull-up effect" in which the color changes due to rubbing and pressure.
Crazy Horse Leather Characteristics
- The surface is impregnated with special wax and oil.
- It has a "pull-up effect" that changes color due to rubbing or pressure
- Scratches and scuffs from use will be a hit
- It has a relatively strong water resistant property
Choosing the best oil
Oils containing wax ingredients are suitable. General leather oils and leather balsams can also be used, but avoid products that contain silicone. Special leather oil is best, but if it is difficult to obtain, a product containing beeswax is a substitute.
Apply frequency and method
No more frequent oiling is required than regular leather. Do this only once every 3-6 months, or if you feel it is clearly dry. Take a small amount of oil into a soft cloth and gently rub it in a circular motion.
Things to note
Over-applying oil can reduce the pull-up effect. It is important to start with a small amount and add as needed. Also, we recommend that you dry it for about a day after oil maintenance before using.
Canvas x Leather Maintenance
Canvas (canvas) productsThe combination of leather and is a popular combination that combines durability and casualness. In this case, the care method differs between the leather and fabric parts, so you will need to use the appropriate method for each.
Characteristics of canvas and leather
- Different combinations of leather and canvas
- Canvas parts are often cleanable
- The leather part requires the same care as regular leather.
- Excellent water resistance and practicality
Oil care for leather parts
Apply oil only to the leather part. Apply oil to the leather edges, handles, and belts, taking care not to soak oil on the fabric. Beeswax-based products are suitable as they are less likely to get oil stains.
Care for the canvas
The basic rule of the canvas is to remove dust with a soft brush. If the stain is severe, use a special cleaner or neutral detergent and never use oil.
Things to note
Pay particular attention to the joints between the leather and canvas to prevent oil from soaking into the canvas. Also, if you use a waterproof leather spray, avoid the canvas part or choose a canvas-compatible product.
Maintenance of PU leather (synthetic leather)
PU leather productsUnlike genuine leather, this is a synthetic material with a polyurethane coating. Since there is no fiber structure like natural leather, oil maintenance is generally not required. Rather, incorrect care can cause damage to the material.
Characteristics of PU leather
- Artificial leather made of synthetic resin
- Natural ageing is unlikely to occur
- Resistant to water and dirt
- Low breathability
Proper care methods
No oil is used, and the surface is kept clean with a synthetic leather cleaner. Just wipe it regularly with a damp cloth for good care. Care products exclusively for PU leather are also available on the market.
Things to note
Common leather oils and creams can damage PU leather. Also, avoid alcohol-based cleaners and petroleum-based solvents as they can peel off the surface and cause cracks.
Storage method
Store in a well-ventilated place away from direct sunlight, high temperatures and humidity. PU leather deteriorates over time, so it is recommended to remove it regularly to check the condition when storing for a long period of time.
| Types of leather | Oil compatibility | Recommended maintenance frequency | Recommended oil/care products |
|---|---|---|---|
| Full grain leather | ◎ | Once every 3-4 months | Natesfoot oil, mink oil |
| Crazy Horse Leather | ◎ (Wax blend recommended) | Once every 3-6 months | Leather oil containing wax, leather balsam |
| Canvas x Leather | ○ (Leather part only) | Once every 3-4 months | Beeswax-based oil (stain-resistant) |
| PU leather | × (cannot be used) | no need | Care with a PU-specific cleaner and damp cloth |
Key points for care by leather type
The key to care for leather products is to choose the right method that suits the material. Oils made mainly of natural ingredients are suitable for high-grade leather such as full grain leather, but different approaches are required for highly processed leathers and synthetic leathers. First, understand which type of leather your leather is made of and choose the right care product for it. Knowing the materials is the first step to using them for a long time.
3. Oil Types and Scientific Characteristics
There are many different types of oils used for leather care, each with different characteristics. Here we will explain in detail the types of major leather oils, their composition and effects, and the selection of the best oil for the leather type.
Main classifications of leather oil
Leather oils can be broadly divided into four categories: animal, vegetable, mineral, and synthetic oils. By understanding each of the characteristics, you can choose the best oil for your leather item.
Animal oil
This oil is extracted from animal-derived fats and is characterized by its high affinity for leather fibers.
- Natesfoot oil: Extracted from the bones of cow legs. Excellent penetration and enhances the flexibility of the leather
- Mink oil: Extracted from mink fat. Highly waterproof and nutrient-relieving
- Lanolin: Extracted from wool. Highly moisturizing and effective in preventing dryness
Compatibility with leather type
Full grain leather
Crazy Horse Leather
PU leather
Vegetable oil
It is an oil extracted from plants and is a relatively light and environmentally friendly option.
- Flaxseed oil: Drying oil has the property of curing over time.
- Jojoba oilTechnically, it's liquid wax. It is resistant to oxidation and is suitable for long-term storage
- Olive oil: Non-drying oil keeps it flexible for a long time, but is prone to oxidation
Compatibility with leather type
Full grain leather
Crazy Horse Leather
PU leather
Mineral Oil
This oil is refined from petroleum and is characterized by its high stability.
- Mineral oil: Inexpensive and widely used, but it can dry out leather in the long term
- Vaseline: Moisturizing effect, but easily stays on the surface and is low internal permeability
- Silicone oil: Effective for surface protection, but in the long run it will prevent the leather from breathing
Compatibility with leather type
Full grain leather
Crazy Horse Leather
PU leather
Composite and special oil
This is a purpose-built leather care product that combines multiple oils and waxes.
- Leather Balsam: Combining oil and wax to keep both moisturizing and protection
- Leather conditioner: A variety of oils are blended in a balanced way, making it versatile.
- Special leather oil:Specially formulated according to the type and characteristics of the leather
Compatibility with leather type
Full grain leather
Crazy Horse Leather
PU leather
Molecular structure and permeability of oils
To understand how oil works on leather, it is important to know its molecular structure and permeability. The effectiveness of care varies greatly depending on how oil penetrates between the collagen fibers of the leather and how it functions.
Molecular Size and Permeability
In general, light oils with low molecular weight (such as Natesfoot oil) easily penetrate deep into the leather fibers, making them effective in moisturizing and softening from inside. On the other hand, heavy oils with high molecular weights (such as mink oil) tend to stay on the surface and act as a protective barrier.
Polarity and Affinity
The polarity of the oil (electromolecular bias) also affects the permeability. Animal oils have a chemically similar structure to collagen fibers, making them highly compatible with leather and can be expected to penetrate naturally. Vegetable oils also have a certain affinity, but mineral oils tend to have a lower affinity.
Drying and non-drying oils
Drying oils (such as flaxseed oil) have the property of oxidizing and hardening when exposed to air. This property helps to form a thin protective layer on the surface, but excessive use can also cause the leather to become stiff. Non-drying oils (such as olive oil) harden less due to oxidation and maintain flexibility for a long time, but can cause odors over time.
Relationship between temperature and permeability
The higher the temperature, the lower the viscosity of most oils, and the more likely it is to penetrate. For this reason, it is effective to warm it with heat from your hands before applying oil, or to care for it in an environment where the room temperature is moderately warm. This is a good idea to pay attention to this point, especially during low temperatures, such as winter.
The difference between oil and cream wax
In addition to oils, leather care products include creams and waxes. Understanding each of the characteristics and appropriate uses will allow for more effective care.
Leather oil
- Highly permeable in liquid form
- High moisturizing effect from inside
- Increases leather flexibility
- Revival of dry leather
- Initial care of new leather
- Products that require flexibility (Travel bagetc.)
Leather Cream
- Creamy and intermediate between oil and wax
- A balance between moderate penetration and surface protection
- Colored products can also be used to restore colors
- Daily maintenance
- Colored leather care
- Products that require balanced care (Business bagetc.)
Leather wax
- The main purpose is to protect the surface with solid shape
- Low penetration but high waterproofing
- It has the effect of giving it a glossy effect
- Leather that requires surface protection (products that touch rain and snow)
- If you want glossy
- Products for outdoor use (Backpacketc.)
Guide to selecting oils for each leather product
Finally, we will show you how to choose the best oil for each major leather product category. The optimal care product will vary depending on the product's intended use and performance required.
| Types of leather products | Recommended oil type | Points to choose |
|---|---|---|
| Backpack | Oil and wax mixed products | Choose one that balances water resistance and flexibility. Flexibility is especially important for the strap part. |
| Business bag | Leather Cream | Choose ones that maintain a luster and luxurious feel while still maintaining moderate moisture. Colorless or similar colors are recommended |
| Travel bag | Heavy oil (mink oil, etc.) | Choose one that is effective in increasing waterproofness and durability. Particularly, the bottom and corners have a lot of friction. |
| Crossbody bag | Light to medium oil | Choose ones that emphasize flexibility and texture. In particular, the belt part is bent and stretched frequently, so please be careful. |
| Mini Shoulder・Small items | Light oil | If you want to minimize color changes, choose a colorless, transparent oil. Regular care is required for areas that are frequently touched with your hands |
Oil's "balance between penetration and protection"
Ideal leather care is a balanced solution of internal penetration and surface protection. For example, a two-step approach is effective: first moisturizing the inside with a light oil, then protecting the surface with wax ingredients if necessary. but,Travel bagLarger products like this require time and effort, so choosing a balanced, combined product is practical. In all cases, it is most important to closely observe the condition of the leather and provide the necessary care for the areas you need.
4. Correct oil maintenance procedure
To maximize the effectiveness of leather care, it is important to carry out the oil maintenance using the correct procedure. Here we will explain in detail step by step, from preparing leather to finishing.
Preparation before maintenance
By making proper preparations, the oil penetrates more effectively and creates a beautiful finish without evenness. Follow these steps to lay the foundation for your leather care.
Cleaning leather products
First, use a dry, soft brush or cloth to carefully remove dust and dirt from the surface. Be especially careful of dust that has accumulated in the seams and gaps. If the dirt is severe, gently wipe it off using a leather cleaner or neutral soapy water. When doing this, be careful not to get too wet.
Let it dry completely
After cleaning, let the leather dry completely before applying oil. Applying oil while wet will not allow for even penetration and may cause stains and unevenness. Let it dry naturally and avoid direct sunlight or strong heat sources. It can take at least a few hours to dry, and 24 hours if wet.
Do a test application
If you are using oils for the first time or with dark leather products, test apply in an inconspicuous place to check the color change and penetration. Color changes can be noticeable in special leather or brightly colored leather.
Improve your work environment
Ideally, oil maintenance is carried out in an environment with moderate room temperature (approximately 15-25°C) and humidity (approximately 40-60%). Also, protect the place where you will place your leather products with newspaper or towels to prevent oil from sticking to the surrounding area.
Correct oil application method
The oil application method varies slightly depending on the type and size of the leather product, but the basic steps are as follows.
Take an appropriate amount of oil
Apply a small amount of oil into a clean, soft cloth (such as cotton cloth or microfiber). Instead of dripping directly onto the leather, be sure to remove it on a cloth before applying it. We recommend adding a small amount, and if there is not enough.
Paint in a circle
Gently apply oil to the surface of the leather in small circles. Don't put too much effort into it, but try to apply evenly. Parts where bends and stretches are particularly frequently performed (Crossbody bag(such as the strap part) is carefully done.
Spread evenly throughout
Instead of painting the whole thing at once, carefully divide it into small sections. for example,Business bagIf so, work them separately on the front, back, and sides to create a uniform finish.
Parts that need to be particularly careful
Special care is required when it is likely to accumulate oil, such as seams, joints, and folded areas. After application, gently wipe these areas with a soft cloth to remove excess oil.
Care after applying oil and precautions
Care after the oil has been applied is also important for beautiful finish and lasting effects. Please note the following points:
Ensure sufficient drying time
After applying oil, allow enough drying time to allow the leather to penetrate well. We recommend refraining from using it for at least 24 hours, and if possible, about 48 hours. If used in a hurry, the oil will not penetrate evenly, causing stains and stickiness.
Remove excess oil
After drying time, if there is excess oil left on the surface, gently wipe it off with a clean cloth. This process is important, especially with special leather, as excess oil can damage the properties of the leather.
Avoid direct sunlight and high temperatures
Store leather products after oiling away from direct sunlight or high temperatures. Especially during the drying process, these environments can alter the oil components and deform the leather.
Observe the situation and decide on additional care
After about a week has passed since the oil was applied, observe the leather. Additional oil care may be required, especially for areas that have been dried very rapidly or are frequently used. However, it is recommended that you only add to the areas you need, rather than reapplying the entirety.
Maintenance specific points for each product
Maintenance methods vary slightly depending on the type and size of the leather product. Here we will explain the key points by product category.
| Product Categories | Special maintenance points |
|---|---|
| Backpack |
|
| Business bag |
|
| Travel bag |
|
| Crossbody bag |
|
| Mini Shoulder・Small items |
|
Tips for applying leather oil
There is a basic principle of effective oil application to leather products: "Start less and add gradually." Rather than applying a large amount of oil at once, it is better to apply small amounts in multiple portions to achieve a uniform and beautiful finish. Also, lightly warming it with your palm before applying oil will improve penetration. In particular, careful care can be taken to the parts that are bent and extended, such as the belt and handle, to prevent cracks and last longer.
5. Leather troubles and oil solutions
If you use leather products for a long time, you may face a variety of problems. Here we will explain in detail the typical leather problems and solutions that utilize oil. With proper action, many problems can be resolved and the life of the product can be extended.
Hardening and cracking due to drying
One of the most common problems with leather products is hardening and cracking due to dryness. This is especially common in products that have not been used for a long time or in products that have been placed in dry environments.
Condition diagnosis
First, check the condition of the leather. Mild drying results in hardening of the surface and loss of suppleness when bent by hand. If it is severe, small cracks and fine wrinkles may appear. If the drying continues to dry out at a very high level, deep cracks can occur.
Choosing the right oil
Light, highly penetrating oils are effective for dry leather. Natesfoot oil and jojoba oil are suitable. Especially in cases of severe dryness, it is a good idea to try taking care of your teeth in several separate sessions.
Gradual oil application
Instead of applying a large amount of oil at once, apply small amounts in multiple portions. Start with areas that are particularly dry, and wait for the oil to penetrate the leather (for a few hours to overnight). Then apply additional oil if necessary.
Promoting flexibility
Once the oil has penetrated, gently bending and stretching the leather to regain its flexibility. especiallyCrossbody bagWe carefully perform areas where flexibility is important, such as straps.
If serious cracks are already occurring, oil alone may be difficult to fully repair, but it can prevent the condition from getting worse and improve the feel of use.
Water and stain prevention
Wetting water from rain or drinks can leave stains and damage to leather products. Genuine leather products in particular are particularly sensitive to water, so appropriate measures are important.
What to do immediately after getting wet
- Gently absorb moisture with a soft cloth or paper towel (do not rub it)
- Shape it and let it dry naturally in a well-ventilated shade (direct sunlight or heat sources are strictly prohibited)
- After drying completely, apply a light oil thinly.
What to do if water stains occur
- Lightly moisten the whole thing to make the colour even (it involves risks, so tested on inconspicuous areas)
- Gently clean with a leather cleaner, then thoroughly dry and then oil care.
- If there are mild stains, apply a light coating of appropriate oil all over to make the colour even
Water-preventing oil care
- Regular oil care increases natural waterproofing
- Products containing mink oil and bead wax are particularly waterproof.
- Travel bagWe also consider adding waterproof sprays to products that are frequently used outdoors, such as
Water resistance of leather type
- Crazy Horse Leather: Relatively water resistant, but oil care can further enhance resistance
- Standard genuine leather: medium water resistance, regular oil care is important
- Vegetable tanned leather: Water-sensitive and requires special care
- PU leather: It is basically water resistant, but be careful not to penetrate through joints or seams
Fixing fading and uneven color
Suitable oil care can also improve color unevenness due to long-term use, sunlight exposure, and color unevenness due to aging.
Fade correction
If you focus on a small amount of oil on faded areas, the original deep color will often be restored. Regular touch-ups are especially effective for products that are used frequently.
Similar leather creams may be more effective for severe fading. Complementary colours with a colored cream after oil care will give you a more uniform finish.
Uniform color unevenness
- Apply a light oil all over to make the colour even
- Apply oil to bright areas in particular.
- Do it in multiple sessions if necessary
- Some leathers may have a unique unevenness.
- Rather than aiming for perfect uniformity, it is important to be prepared to embrace natural changes.
- Extreme color differences are often not completely resolved after just one care.
Special Case: Revival of Vintage Leather
A special approach is required for vintage leather products that have been left unattended for a long time, or for old leather products found at antique markets.
Condition assessment and cleaning
First, carefully assess the condition of the product. Carefully remove dust and dirt from the surface with a soft brush, and gently clean it with a leather cleaner if necessary. At this stage, check for any damage that is irreparable.
Gradual moisturizing
A step-by-step moisturizing approach is effective for very dry, old leather. First, apply small amounts of highly permeable light oil (such as Natesfoot oil) multiple times over several days. Wait for the leather to begin to "breath" and gradually become able to absorb oil.
Nutrition and protection
Once the leather absorbs basic oils, it is used to nourish deeper nutrition using more nutritious oils and creams (such as mink oil or leather balsam). Finally, it is a good idea to finish it with a product that contains wax ingredients to form the protective layer.
Recovering shape
Once the leather has regained flexibility, we will carefully restore the original shape of the product. Fill the inside as needed to shape it, encouraging it to restore its natural feel. oldTravel bagThis step is especially important.
Issues that cannot be solved with oil
There are limits to oil care. It is important to understand that oil alone cannot completely solve the following problems:
- Serious structural damage (deep cracks and tears)
- Permanent damage caused by mold
- Color changes due to excessive sunburn
- Chemical damage
- Fraying or breaking of the sewing part
We recommend consulting with a professional repair service or leather product repair professional for these issues. Especially expensiveBusiness bagand attached leather products are important for proper repair to maintain value.
6. Maintenance frequency and seasonal care
The optimal frequency of maintenance for leather products depends on the frequency of use, environmental conditions, and the type of leather. Here we will explain in detail the appropriate maintenance schedules for the situation and special seasonal care.
Maintenance frequency by leather product usage status
The optimal oil maintenance interval will vary depending on the frequency of leather products used and environmental conditions. Please refer to the table below to assemble a maintenance schedule that suits your leather products.
| Usage status | Recommended maintenance frequency | remarks |
|---|---|---|
| Daily use (5 days or more per week) | Once every 2-3 months | Parts that you touch with your hands (such as the handle) are particularly susceptible to friction and sweat. |
| Regular use (2-3 days a week) | Once every 3-4 months | Moderate use will provide natural oil replenishment, but regular care is also important |
| Irregularly used (around several times a month) | Once every 4-6 months | It is used infrequently, but be careful not to dry out depending on the condition of storage. |
| Very rarely used (seasonal, etc.) | Once before use and once before storage | Careful care is required during long-term storage |
| Use in harsh environments (outdoor activities, etc.) | Once after use or once every 1-2 months | Exposed to rain and UV raysBackpackRequires frequent care such as |
These frequencies are only a guide. It is important to carefully observe the condition of the leather and, if dryness is observed, care is carried out without waiting for the recommended frequency. Especially for special leather products, it is best to judge them by the changes in surface gloss and feel.
Different maintenance intervals for leather types
The optimal maintenance interval will vary depending on the type of leather. Understand the characteristics of each leather and establish an appropriate care cycle.
Full grain leather
Full grain leather, a high-quality genuine leather, requires regular care. Generally, oil maintenance is appropriate once every 3-4 months, but it is often used.Business bagOr, the handles that are rich in oil and oil from the hands may require more frequent care. In dry climates and air-conditioned environments, it is recommended to increase the frequency of care.
Crazy Horse Leather
Crazy Horse Leather is treated with special oils and waxes during manufacture, allowing for less maintenance than regular leather. For normal use, once every 3-6 months is sufficient. Rather, it is recommended to be careful not to over-apply oil and only do so if you notice any obvious drying.Travel bagFor large products such as: adjust the care according to the frequency of use.
Canvas x Leather
Canvas and leather combination productsWe provide oil care only on the leather part. Generally, once every 4-6 months is sufficient, but it is used frequently.BackpackFor products that are especially stressed on the leather parts, please adjust them while keeping an eye on the condition. If dirt on the canvas is noticeable, we recommend that you clean the fabric separately using a special cleaner.
PU leather (synthetic leather)
PU leather productsAs mentioned above, oil maintenance is generally not required. Instead, we recommend wipe it off regularly with a damp cloth and clean it with a PU cleaner if necessary. Check the condition of the surface about once every 3 to 6 months, and if you notice any cracks or peeling, consider a special care product.
Special care by season
Seasonal changes have a major impact on leather products. Incorporate special seasonal care to accommodate changes in temperature and humidity.
Summer care (high temperature and humid environment)
- Prone to dirt caused by sweat and oil
- High temperature and humidity environments increase the risk of mold
- Sunburn damage caused by UV rays
- Risk of stains caused by sudden rain
- Remove sweat and dirt with frequent wipes
- Apply a light oil thinly (avoid stickiness)
- Special consideration is to store in a well-ventilated area
- Avoid direct sunlight and consider using UV protection agents if necessary
Winter care (low temperature and dry environment)
- Drying leather due to air drying
- Stress caused by sudden temperature changes (difference between outdoor and indoor)
- Stains and damage caused by snow and snowmelt agents
- Accelerating drying with heating
- Applying a little more oil to prevent drying
- Use of highly moisturizing oils such as mink oil
- Wipe off immediately after snow or snowmelt adhesion
- Keep in mind that storage in a humidity-controlled environment
Care for the change of seasons
- Moisturizing care to help you recover from dry winter season
- Improved waterproofing for a period of increasing rain
- Check the condition of spring and summer leather products that have been stored for a long time
- Recovering damage caused by UV rays and sweat in the summer
- Careful moisturizing for the upcoming dry season
- Pre-storage care for summer leather products that are less frequently used
Care and precautions for long-term storage
Special care is required when storing seasonal leather products or products that are not intended to be used for a while for a long period of time. Keep it in good condition and keep it in good condition the next time you use it.
Pre-storage care procedure
- Carefully clean the product and remove all dirt and dust
- Care is carefully carried out with oil suitable for the type of leather
- Wipe off excess oil and dry thoroughly (at least 24 hours)
- Fill as needed to prevent the shape from fading
- Wrap in breathable fabric (such as cotton)
Optimal storage environment
- Temperature: Stable temperature of around 15-25°C
- Humidity: Moderate humidity of around 40-60%
- Light: Dark places that are not exposed to direct sunlight
- Air: Good ventilation and mildew-resistant environment
- Placement: Do not contact other leather products directly (prevent color transfer)
Regular checks
Even during long-term storage, we recommend removing it once every 1-2 months to check its condition. If you notice mold growth or unexpected dryness, take appropriate measures. Be especially careful during the rainy season and dry winter seasons.
Care when resuming use
When resuming use after long-term storage, we recommend that you first carefully check the condition and take light oil care if necessary before using. Especially if the seasons are intersecting, try to take care of your environment according to changes in the environment.
"Breathing" and appropriate frequency of care for leather products
Leather is often described as "breathing," which is a metaphorical representation of its properties of absorbing and releasing water and oil. Understanding this property also gives you an indication of the appropriate frequency of oil care. Over-oiling can prevent the leather from breathing, and conversely shorten the lifespan of the material. Especially when leather has been treated with special treatment, it is important to avoid oiling more than necessary and observe the condition of the leather in a way that listens to the "voice" of the leather itself.Travel bagorBackpackObserve products that are exposed to a variety of environments, such as:
7. Before and After: Effects of Oil Care
The changes that oil maintenance brings to leather products are easier to understand when you look at real-world examples than you would describe them in words. Here we present the dramatic benefits of proper oil care through typical before and after cases.
Case 1: Revival of dry genuine leather backpacks
A genuine leather backpack that has been used for two years and is often exposed to sunlight and dry environments. The surface was dry and hard, and the part that hit the strap and shoulders had hardened in particular. The colour also faded throughout, with some early symptoms of cracking.
Before (before oil care)
- It was stiff overall, especially the straps were less flexible.
- The colour was not uniform and the faded parts were noticeable
- The surface was dry and unshiny, and rough to the touch.
- Fine cracks were beginning to appear on the corners and edges.
After (after oil care)
- The whole leather is softer, and the flexibility of the straps in particular is restored
- The color has returned to its depth and has a uniform colour
- The natural luster has been restored and the feel has been improved smoothly
- Early cracks become less noticeable and prevent new progression
The oil used: Mixing of Natesfoot oil and mink oil
Care procedures: After cleaning, first apply light Nettefoot oil to help it penetrate inside, and after drying for a day, the surface is protected with mink oil. We took great care of the areas where the dryness is particularly severe.
Case 2: Repairing a business bag damaged by water
A business bag that was suddenly wet by the rain and was left dry without proper care. Water stains appeared on the surface, and some hardened and the shape was distorted. Clear water stains remained in particular on the bottom and sides, making the surface uneven.
Before (before oil care)
- There were several clear water stains on the surface.
- The leather has partially hardened, especially in water.
- There is an overall uneven color, and the water stains become dark and discolored
- The original gloss was lost and the surface was dull
After (after oil care)
- Water stains have been significantly reduced and become less noticeable
- The leather has restored flexibility and the shape of the bag is also based on the
- The color tone is even, reducing the difference between the wet areas
- The natural luster is returned overall, and the luxurious feel is restored
The oil used: Leather conditioner and leather balsam
Care procedures: First, lightly treat the whole thing with a leather conditioner and carefully apply it to areas with water stains. After drying for 24 hours, a protective layer was formed by applying a thin layer of leather balsam over the entire area.
Case 3: The revival of old vintage leather bags
The 1970s leather travel bags, which had been stored in warehouses for many years, were extremely dry and featured many cracks and wrinkles on the surface. The leather hardened and its shape lost, and the handle part was particularly deteriorating. Initially it seemed irreparable, but the staged oil care showed an incredible recovery.
Before (before oil care)
- The whole leather was very hard and dry like paper.
- Many fine cracks and wrinkles on the surface
- The colour was faded and dull
- Significant deterioration and hardening of the handle
After (after oil care)
- The leather has significantly restored its flexibility and is ready for use
- Deep cracks remain, but progression stops and stabilizes
- The color has a deeper and gloss, giving it a distinctive vintage feel
- The handle has also been flexibly restored, and the strength to withstand use
The oil used: Jojoba oil, Natesfoot oil, Leather Balsam
Care procedures: Performed step-by-step treatment over a period of three weeks. First, apply small amounts of highly permeable jojoba oil several times. Next, I used Natesfoot oil to nourish it, and finally a protective finish with leather balsam. We have repeatedly taken thorough care of the areas that are particularly severely deteriorated.
Effects of oil maintenance: Summary
As evidenced by these cases, proper oil maintenance can have the following benefits for leather products:
Revival and deepen the color and luster
Oil care will restore the depth and luster of lost colour. This effect is particularly noticeable in leather exposed to dryness and sunlight.Travel bagorBackpackEven large products like this can restore even beautiful, uniform colour tones.
Flexibility and shape recovery
Hardened leather also regains flexibility with proper oil care. This improves usability and prevents further damage. especiallyCrossbody bagThis is especially important in areas where the straps are repeatedly bent and extended.
A significant extension of life expectancy
Regular oil maintenance can extend the lifespan of leather products many times. It prevents cracks and structural damage caused by drying, and can maintain a beautiful state for a long time. High qualityBusiness bagWith proper care, etc. can be used for decades.
Promoting beautiful changes over time
Oil care does not interfere with the beautiful changes in leather over time, but rather promotes it. With proper care, the leather "ages" rather than deteriorate, and its unique texture will increase over time. This is especially true in high quality genuine leather products.
History of care recorded in photographs
We recommend that you record oil maintenance and age changes in leather products in photos. When new, you can visually see the process of leather growing by taking photos like fixed-point observations, from 3 months to 6 months, 1 year, and 3 years after its in use. This is more than just a record, it is a valuable source of information to help you find the best way to care for. This kind of record will be a guideline for proper care in the future, especially with high quality leather.
8. Frequently Asked Questions
A: Yes, in most cases, oiling will cause the leather to become slightly darker. Color changes can be noticeable, especially when using brightly colored leather or when doing oil care for the first time. This color change is often permanent, so it is recommended to test it in an inconspicuous area. In many leather products, this deepening of color is considered a desirable effect, enriching the texture of the product.
A: The basic principle is "start small amounts and add them gradually." In many cases, small leather products (Mini ShoulderIf it is (such as) it is about 1/4 teaspoon, it is a large product (Travel bag(such as) it is appropriate to start with about 1 teaspoon. Remove the oil on the fabric and apply it lightly, and add it as needed, making sure the leather absorbs. Over-applying oil can cause problems such as stickiness, discoloration, and changes in the properties of the leather.
A: The appropriate oil varies depending on the type of leather. A variety of leather oils can be used for general full grain leather, but with special leather it is important to choose the right care product for each. For example, Crazy Horse Leather is suitable for products that contain wax ingredients. Avoid regular oils for suede and nubuck, and use special care products. If there are any care products recommended by the leather manufacturer, it is safest to follow them.
A: No, it is important to dry thoroughly after applying oil. Avoid using for at least 24 hours, ideally about 48 hours, and wait for the oil to penetrate the leather well and the excess oil to dry out. If you rush to use it, the oil may transfer to your clothes or unevenness may occur without penetrating evenly through the inside of the leather. especiallyBusiness bagSpecial care is required for products that often come into contact with clothing, such as:
A: No, make sure to dry completely before applying oil after getting wet. First, gently absorb moisture with a soft cloth or paper towel and let it dry naturally (do not use heat sources such as hair dryers). After it is completely dry (usually for more than 24 hours), perform oil care if necessary. Applying oil while still moisture can cause water to mix with the oil and stains, or moisture trapped inside the leather, causing deterioration.
A: Leather cream is generally more suitable for daily care. Creams are lighter than oils and tend to stay on the surface, so even if they are used frequently, there is a lower risk of excessive oil buildup. The ideal combination is to use oil for deeper care, about once every 3-4 months, and cream for light maintenance during this time. However, for special leather, it is recommended to follow a dedicated care product to maintain its properties.
A: Over-oiling can cause problems like:
- Sticky surfaces remain, making dust and dirt more likely to adhere
- The leather's breathing is hindered, causing deterioration in the interior
- Excessive oil oxidizes and creates an unpleasant odor
- Special leather damages the original texture and characteristics.
- The leather becomes excessively soft and the shape retention power decreases
- Oil transfers to clothing etc.
To avoid these issues, it is safe to start with a small amount and then gradually add it while watching the leather reaction.
A: It can be used as a temporary emergency response, but we strongly recommend using a dedicated leather oil for long-term care. Edible oils have the following problems:
- Oxidates over time, causing malodors
- Not suitable for the fiber structure of leather
- It does not contain preservatives, which increases the risk of mold growth
- It can degrade the leather in the long term
Be sure to use special care products, especially for high-quality leather products.
A: It is common for a temporary loss of gloss immediately after oil maintenance. This is because the leather absorbs oil and changes the properties of the surface. Normally, the natural luster will return within a few days to a week. If you want to quickly restore the luster, gently polishing with a soft cloth can help improve your condition. However, if the gloss does not return after a long period of time, the oil may not be suitable for leather or it may be over-applied. Consider a different type of oil for your next maintenance or try reducing the amount.
A: No, do not use regular leather oils on brushed leather such as suede or nubuck. The surface of these leathers is treated with a special treatment, and when oil is applied, the brushing will collapse and the unique texture will be lost. We recommend using a special suede protector or conditioner for brushed leather and using a special brush to care for it. If oil gets on the skin by mistake, you can quickly absorb it with a paper towel and gently brush it with a special suede brush to recover to some extent.
summary
Oil maintenance on leather products is more than just a maintenance task. This can be said to bring out the innate beauty and durability of leather and build a special relationship with its owner.
In this article, we have explained in detail the overall picture of leather oil maintenance, from the scientific structure of leather to the role of oil, how to maintain leather types, actual procedures, how to deal with problems, seasonal care, and actual effects.
By providing proper oil care, leather products can be transformed from just "something" to "attached partners," allowing them to continue using for years or decades. Various problems such as water, dryness, and fading can be overcome with correct knowledge and proper care.
The most important thing when maintaining oil for leather products is to listen to the "voice" of the leather and provide care according to the condition. Rather than excessive care, it is important to provide the necessary care at the right time and walk along with the leather.
We hope that through proper oil care, you will be able to bring out the natural beauty of your leather products, and that you will be able to use them for a long time, along with attachment that deepens over time. I hope this article is of some help to you as a first step towards building a beautiful relationship with leather.
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Author information
Author: Yama (Cowmono Owner)
Occupation: Slowth lab Representative
Self-introduction: Worked in sales and marketing for domestic and international apparel companies over quarterly. He has a deep knowledge of fashion, sports, outdoor activities, and subculture.