Why do white clothes turn yellow?

The reasons why white clothes turn yellow in the cupboard are:

1, the dust adsorbed by white clothes reacts chemically under the action of air and mold, making white clothes yellow.

2. White clothes are whitened with fluorescent agent when they leave the factory. After a long time, the fluorescent agent will be lost, causing the white clothes to turn yellow.

3, often in the sun's exposure, white clothes are oxidized and yellow.

4, because sweating is not cleaned in time, it will also cause white clothes to turn yellow.

Extended data:

Treatment of yellow white clothes:

1. When washing yellow clothes, drop fresh lemon juice on the yellow part of white clothes, add some salt and rub it gently, then expose the clothes to the sun to make the yellow fade.

2. Bleached silk and wool fabric can be bleached with 3% hydrogen peroxide, and the liquid volume is 10 times of the weight of the fabric, and a small amount of ammonia water is added to make it weakly alkaline. After soaking and bleaching for 5- 10 hours, they were washed and dried.

3. When washing white silk fabrics, adding lemon juice to water can make clothes whiter.

4. Soak the white silk fabric with skim milk before washing, or add 2 tablespoons of milk in the water during the last rinse to keep the natural color of the white silk fabric and prevent it from turning yellow.

References:

People's Network _ Lemonade can remove macula on clothes?