Water-Based Pigments, Continued
Gouache is classified by degree of permanence, opacity, and staining
properties based on tests and research. Select a degree of permanence that
suits your needs.
Permanence is designated according to this table:
A permanent artist-grade pigment.
A moderately permanent, student-grade pigment.
Nonpermanent pigment for general public or
Opacity is designated according to this table:
Staining properties are designated according to this table:
Nonstaining and safe to wash over.
Moderately safe but, some dyes may bleed into an
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