Can you give me simple definition please of the difference between fugitive dyes and dyes which bleed?

Answer 1

Fugitive dyes are natural dyes that fade and/or change color dramatically over a long period of time (usually many years). Some fugitive dyes fade away completely, while others change color, for example, a bright blue fugitive dye might fade to a light tan. They were mostly used to dye fabric before the invention of chemical dyes in the early 20th century.

Bleeding of dye colors is the transfer of a dye in fabric to part of the same fabric or another fabric when the fabric is wet. This can occur with older fabrics, and even with cheaper modern fabrics. The mostly likely dye color to bleed is red (although other colors can bleed). Washing white/light colored clothes separately from darker, more deeply dyed clothes is a common way to to avoid having dye from a dark fabric bleeding into a light or white fabric.