Process for preparing vat pigment dyes
Process for the manufacture of vat dyes
Process for the reoxidation of dyeings made with sulfur dyestuff
Rope dyeing process using halogen indigo derivative and dyed art
Sulfur dye compositions and their production
Sulfur dyes
Sulphur dyestuffs, a process for their manufacture and their use
Vat dye and sulfur dye compositions
Vat dyes