Water-Based Pigments, Continued
Gouache
permanence
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:
Designator
Meaning
A
A permanent artist-grade pigment.
B
A moderately permanent, student-grade pigment.
C
Nonpermanent pigment for general public or
classroom use.
Opacity is designated according to this table:
Designator
O
R
Meaning
Opaque.
Reasonably opaque.
P
Partially transparent.
T
Transparent.
Staining properties are designated according to this table:
Designator
Meaning
N
M
Nonstaining and safe to wash over.
Moderately safe but, some dyes may bleed into an
overwash.
S
Staining
SS
Strongly staining.
Continued on next page
l-58
