Why does leather age?

Why does leather change over time? Revealing the secret

Why does leather change over time? Revealing the secret

Many people who use leather products find the aging process to be very appealing. In this article, we will explain the scientific process of how leather changes over time.

What happens to leather over time?

The change in color and texture of leather products over time is called patina, or aging. This change develops a natural luster on the surface of the leather, adding depth and character, which is one of the characteristics that is appealing to many leather lovers.

Back to Contents

Factors that promote aging

Factors that accelerate the aging of leather include environmental factors such as sunlight, friction, humidity, and temperature, as well as the tanning and finishing techniques used on the leather. Frequency of use and care also have a significant impact on the aging of the leather.

Back to Contents

Types of aging

Changes that occur with age in leather include color changes, the formation of wrinkles and scratches, softening, etc. These will vary depending on the type of leather used; vegetable-tanned leather tends to have a deeper color, while chrome-tanned leather tends to become softer.

Back to Contents

Mechanism of aging

The mechanism of leather aging is mainly due to the reaction of the collagen fibers that make up the leather. When exposed to sunlight, ultraviolet rays affect the leather's pigments, producing deeper tones. At the same time, the natural oils in the leather decrease over time, which makes the leather softer and more lustrous.

When leather is subjected to friction and pressure, wrinkles and scratches appear on the surface, and its unique character begins to emerge. These elements combine to give the leather product a unique appearance that reflects the lifestyle of its owner.

Back to Contents

How to care for aged leather

Proper care is important for controlling the aging of leather and enjoying it for a long time. By keeping it clean and regularly nourishing it with special creams and waxes, leather will stay healthy and show beautiful aging.

Back to Contents


You can view COWMONO leather products, which offer high quality at low prices, below.

Click here for Crazy Horse Leather products

Genuine leather products available here

We also sell high-quality PU leather products that allow you to enjoy the texture of leather at an affordable price.


Author Information


Author: Yama (Cowmono Owner)

Occupation: Owner of Slowth Lab

Self-introduction: I have worked in sales and marketing at apparel companies in Japan and overseas for over a quarter of a year. I have a deep knowledge of mode fashion, sports, outdoors, and subculture.