What are the reasons for the yellowing of white down jackets?

The yellowing of white clothes is mainly caused by improper washing and sweating. Ammonia, enzyme, refrigerator, lemon juice and salt can all be used for washing. Details are as follows:

1, use ammonia water to remove yellow stains and sweat stains caused by sweating. Because sweat containing fat is easy to condense in fabric fibers, add about 2 tablespoons of ammonia water when washing. After soaking for a few minutes, knead for a while, then rinse with clear water to remove yellow sweat stains.

2. Enzyme lotion removes yellow stains. Sweat stains and oil stains on clothes belong to protein stains. The bio-enzyme components of enzyme lotion can decompose protein stains. The enzyme emulsion can be dissolved with 40℃ warm water to fully activate the activity of its sacred biological enzyme. After clothes are soaked for a period of time, they can be easily decontaminated by gentle rubbing.

3. Freeze the white clothes in the refrigerator to remove the yellow stains. Put the washed clothes into fresh-keeping bags and put them in the freezer. Take it out after about an hour to make the white clothes bright and white. This method is not only suitable for white clothes, but also for other light-colored clothes.

4, lemon juice+salt to remove yellow stains, a traditional way is to hang yellow clothes in the hot sun, but before that, you have to spray fresh lemon juice on the yellow place, then put some salt and gently rub.

Precautions:

1, the water temperature is suitable. When washing clothes, the water temperature should be close to the temperature when washing clothes, so as to avoid yellowing of clothes after drying.

2, clothes drying. When hanging clothes, you can hang them upside down, facing the sun inside, to avoid yellowing after drying outside.