The dye is first made into paste with a little water (containing the requisite amount of Sulphide and soda ash) and then boiled for about ten minutes with further addition of water, to make solution.
Sulphur balck BR/BN 200% is our strong item. We can also supply sulphur black and another sulphur dyes at low price as you needed.
If youre interested, please contact me asap.We will be able to quote you very advantageous price.
Looking forward to your kind reply.
