- 1). Only wash your jeans occasionally. Because of the sturdiness of denim, it is not necessary to wash your jeans after every use. Most jeans only need to be washed every three to four times you wear them. Washing them less frequently will reduce the wear on the denim, making it retain its color better.
- 2). Wash your jeans inside-out. This will reduce the amount of time the surface of your jeans is exposed to water and harsh detergents, making them less likely to fade.
- 3). Wash your jeans on a cold setting with a cold rinse cycle. Hot water can cause clothes to "bleed" colors, which is particularly true of dyed denim. By washing your denim on the coldest setting your machine offers, you will still get your jeans clean but save their color in the process.
- 4). Wash your jeans in vinegar before putting them in a regular wash cycle. However, some people do not like this method, as the smell of vinegar is so strong it can be hard to remove, even with detergent.
- 5). Avoid certain cleaning methods. Both dry cleaning and drying your pants outside on a clothesline will cause your denim to fade faster than it normally wood; by washing your jeans at home using a dryer to get them dry, you will preserve the original color of your jeans for as long as possible.
Source...