Leuco Sulphur Brown 21

80 parts of??4-Methylbenzene-1,3-diamine?, 48 parts of?4-Nitrobenzenamine?and 283 parts of sulfur was stirred at?200 ~ 210 ℃ calcination 10 hours, then use Sodium sulfide solution treatment its product (BISO 1155, 39).

yellow brown.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Fulling	Persperation Fastness	Soaping
						Moderate	Severe
ISO	1-2	4	4	4	4-5	4	4