Use alcohol, gasoline and nail polish remover. The permeability is particularly strong, and once it is dyed, it is difficult to remove it.

3% hydrogen peroxide is diluted with water according to the ratio of 1: 5, and a few drops of ammonia water or soda water solution are added, and the solution is lightly brushed with a soft brush. In order to further improve the bleaching effect, the solution can be heated appropriately. This method uses oxidative bleaching to remove the color of leather surface. ?

Dissolve sodium hydrosulfite in warm water to make 3-5% solution, and gently brush with a soft brush dipped in the solution. This is a way to reduce bleaching. If the above method is used properly, it should be possible to remove the dye. However, due to the bleeding of leather board, the whiteness of leather bag may be affected by some factors.

Silica gel products can be cleaned with clean water. If it is not so smooth and uneven, you can find a small brush to clean it gently. If cleaning really doesn't work, you can put soap on it to clean it.

Function of silica gel

Silica gel has the characteristics of strong adsorption, rapid and effective adsorption of water in sealed packaging, stable chemical properties and innocuity. Coupled with the continuous innovation and development in recent years, various silica gels have been widely used in drug purification, DNA separation, food drying, high-precision electronics, advanced cosmetics, sewage purification, beer purification, advanced coatings and resin production or preservation. In our daily life and production and business activities, silica gel is often used in the following aspects:

Dry and mildew-proof packaging of precision optical instruments and electronic appliances; ?

Leather drying, such as putting it in leather clothes, belts and leather shoes, plays the role of drying and quality assurance; ?

In terms of food drying, it is more common in biscuits and fried foods to ensure the crispness of food;

In the aspect of drug drying, put it in a medicine bottle to ensure the shelf life of the drug to be prolonged; ?

Container drying: the transported container will form "internal rain" in the container at different latitudes. If silica gel desiccant is used, it can absorb the water equivalent to its own weight, effectively reduce the dew point and control the condensation phenomenon of containers during 50 days of ocean transportation. ?

Hotel supplies, such as items placed in wardrobes, shoes and beds, absorb all kinds of smells and keep the air dry and fresh.