basic dyes
A class of dyes, usually synthetic, that act as
bases, and which are actually ANILINE DYES . Their
color base is not water soluble but can be made so
by converting the base into a salt. The basic
dyes, while possessing great tinctorial strength
and brightness, are not generally light-fast;
therefore their use in the dyeing of archival
materials is largely restricted to those materials
not requiring this characteristic. Basic dyes were
at one time used extensively in dyeing leather,
mainly because they are capable of combining
directly with vegetable-tanned leather without the
use of a mordant. See also: DYE , (17 , 62 , 72 )
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