2. Pour warm water to melt the soap and stir well. Never soak denim clothes in hot water, which will cause a great degree of shrinkage. Just keep the water temperature at about 30 degrees.

3. Soak jeans in soapy water for two minutes to remove the floating color that is easy to fall off the surface.

4. Wash your pants with clean water.

5. Put another pot of warm water.

6. Add a spoonful of salt, which is volatile and enhances the penetration of pigment molecules into the fiber to achieve color fixation (to prevent fading).

7, put a little vinegar, add vinegar to prevent fading because dyes are unstable under alkaline conditions and more stable under acidic conditions. But the amount of vinegar should not be too much, otherwise it is easy to dye light-colored clothes.

8. Soak the reverse side of jeans in the mixed solution for about half an hour, which can achieve the effect of maintaining the true color of jeans, and then carry out routine cleaning.

9. Wash jeans with water. It is not advisable to use a dryer. Turn them over to dry.

10. Jeans should not be exposed to the sun, but should be hung in a cool and ventilated place.