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Generic Name
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Colour Index Hue
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Acid Violet 4 BS
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Acid Violet 49
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Patent Blue AS
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Acid Blue 7
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Acid Green V
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Acid Green 16
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Acid Black WA
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Acid Black 52
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Acid Black 108 X
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Acid Black 1
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Acid Black RG
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Acid Black 234
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Blue 2G
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Acid Blue 158
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Blue RB
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Acid Blue 92
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Brown 2RL
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Brown 45
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Brown BG
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Brown 98
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Properties of Acid DYES :
Acid dyes are water soluble anionic dyes that are applied to fibres such as silk,
wool, nylon and modified acrylic fibres from neutral to acid dye baths. Attachment
to the fibre is attributed, at least partly, to salt formation between anionic groups
in the dyes and cationic groups in the fibre. Water soluable Acid dyes are not substantive
to cellulosic fibres. Acid dyes are used both commercially and by the studio dyer
to dye protein/animal fibers such as wool, silk, mohair, angora, alpaca and some
nylons and synthetics. Acid dyes require the use of an acid such as vinegar, acetic
or sulphuric acid to set the colour..
Acid dyes sound scary to some novices, who imagine that the dyes themselves are
caustic strong acids. In fact, the dyes are non-caustic, are in many cases non-toxic,
and are named for the mild acid (such as vinegar) used in the dyeing process, and
for the types of bonds they form to the fiber. Some of them are significantly more
toxic than fiber reactive dyes, while others are even safe enough to eat, and are
sold as food coloring.
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