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3-Amino-4-hydroxybenzenesulfonamide diazo, and Naphthalen-2-ol coupling, and then use cobalt chloride is transformed into 1:2 cobalt complex.

dark blue light red. Apply to polyamide, wool, silk and their blended fabric dyeing and printing, mainly for the dye shallow color, can be used for dyeing light color car seat, carpet of dyeing and printing. It has excellent resistance to sun levelness and color fastness, has a good spell of color, reproducibility and colored light stability.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	7-8	4		4-5	3-4		4-5
AATCC	6-7	3		5			4