[Sca-cooks] OT animal v plant dyes

[Jennifer Thompson]

>
> Evidently there are two classes of dyes (Kiri really doesn't
> know what she's talking about here...but is quoting what she's been told),
one of
> which works on animal fibres
> and the other works on everything else.

What I've been told on this is that acid dyes (whether that's vinegar and
kool aid or Procion Acid Dyes) are for animal - wool, dog hair, silk and
everything in between; Alkaline dyes are for plant - cotton, linen, hemp,
and  palm tree for all I know.  (And ditto on the clueless and quoting part)


>> Acids are for protein fibers,
>> including silk, of course.  Alkalis are for cellulose fibers. Vinegar
will
>> weaken cellulose fibers and alkali will actually make them stronger.