Main term wool dye, apt bath is it is it dye to boil to go on in strong acid (dye liquor PH should regulate in 2-4 ). The silk is dyed and gone on in the acetic acid bath. The polyamide fibre is dyed to go on in the formic acid bath. The fabrics are dyed, when wool and many kinds of fibres dye with the bath, dye on the polyamide fibre, the silk is stained with the color seriously, the acetate fiber is slightly stained with the color, it is not stained with the color to glue the glue. It is can be used in printing stamp directly on the wool fabric printing stamp. Can dye the leather . Can also make the color lake . Is it is it dye to paint to use for at paper and surface colour , can use for person who paint , medicine and cosmetics, for plastic coating , such as polyvinyl chloride and polyethylene , etc..