... 3.content of calcium and magnesium:4000PPM max Leather Tanning Chemicals 2. The main technical standard ... , vat dye, reactive dye, acid dye and leather dye. It has good grinding effect, hydrotropy and ... as dosage is preferable.7) As dispersant in leather and rubber industry. Can disperse sulfur,accelerant, ... 10% solution, then grind with others in ball grinder.8)Also can be used in coating, ...