i.
Acid dyes are water soluble.
ii.
Good light fastness
iii.
Direct affinity toward protein fibres and
polyamide fibres.
iv.
Bright shade possible
v.
Sodium salt of organic acid.
vi.
They are always applied in organic or inorganic
acid medium.
vii.
Most of cellulose fibres will not exhaust acid
dyes.
viii.
They produce brilliant shades.