What to bleach pulp with

Should be using calcium hypochlorite, from the price of calcium hypochlorite should be cheaper,

Operation is simple, the most important thing is to use calcium hypochlorite bleaching, the effect is permanent, the reason is that calcium hypochlorite hydrolysis of hypochlorous acid has a strong oxidizing properties, can be oxidized to colorless substances; and the reason why the sulfur dioxide has a bleaching effect, is because he combines with the colored material to generate colorless substances, its bleaching effect is not permanent, after a period of time the colorless material will decompose to generate the original colored material, the effect is not good

. Substances, its bleaching effect is not permanent, after a period of time colorless substances will be decomposed to generate the original colored substances, the effect is not good