Sulphur Black BR, also know as Sulphur Black 1 is one popular sulphur dye for dyeing cotton especially dyeing denim. There are Sulphur Black B and Sulphur Black BR two main color shade. Price is affordable.
Solubilished Sulphur Black is one special Sulphur Black dye, it can be soluble in normal water. For Sulphur dyes, they have good light fastness and washing fastness but color is not bright enough.