Acid Brown 4
Acid dyes have broad range shades, with good value, for piece dyeing wool and worsted goods. Fair to good leveling and light fastness.
 

Acid Brown 4
Properties and Applications：
red light brown. Soluble in water for red light brown, soluble in ethanol for yellow light brown. The strong sulfuric acid for wine red, dark blue, diluted to the red orange. Strong hydrochloric acid solution to join a brown orange precipitation; Add thick sodium hydroxide solution for palm orange.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	3	3-4	2	2	3		1-2

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