How to use several common bleaching agents:
1
The aqueous solution of hydrogen peroxide (30~35%) and ammonia water (28%) are mixed in a ratio of 1: l and applied to the surface of the thin wood to let it dry slowly. The surface of the thin wood is bleached. This is a good bleaching effect with bleach. Can be applied, but the storage time of the bleaching agent is only 30 minutes, and there is ammonia odor, the working conditions are poor, and it is required to apply quickly.
2
Two-liquid coating: According to the following formula, the two liquids are liquid A and liquid B. Liquid A: anhydrous calcium carbonate 10g, adding 50 degrees warm water 60g B liquid: hydrogen peroxide solution (35%) 80ml, adding 20ml water, first Apply A liquid on the surface of the thin wood, let it fully and evenly penetrate. After 5 minutes, wipe off the surface exudate with cloth, then apply B liquid, dry for 3h, wipe the surface with damp cloth after drying, until the yellow is gone. Improve the bleaching effect, the drying time can be extended to 18 ~ 24h, the use of this bleach should pay attention to the A liquid and B liquid can not be mixed, the container and the brush should be separated.
3
Sodium imidate 3g Water 100g is formulated into a bleaching solution. It is added to the solution of 0.5g of glacial acetic acid and 100g of water to be dried at a temperature of 60 to 70 degrees for 5 to 10 minutes before use. The thin wood is bleached.
4
Sodium hypochlorite 5g and water 95g, while heating, dissolve it, then apply heat to the surface of the thin wood, or add a small amount of benzoic acid or sulfuric acid and then apply. This method is better for bleaching the willow.
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