We are professional manufacturer of Acid Chrome Black PV (C. I. No. Mordant Black 9), its excellent potting fastness has up to the standard of Japanese YAMATA acid chrome black WPN.
Solubility: 200g/l
Strength: 200%
Wool felt: 4
Chroma: 4-5
Cotton felt: 4-5
Please feel free to contact me, in case you are interested in this dye.