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Thioindigoid Violet

PR88

Alternate Name

Thioindigoid Red

Pigment Description

This plum color is unfortunately no longer available. It has decent lightfastness, but may fade some in tints. As far as replacement pigments, PV19 comes close, though the PR88 sample we have seen was a bit closer to a true purple, while the violet kinds of PV19 are a touch redder than PR88. Bruce MacEvoy recommended other pigments due to lightfastness (such as the slightly lower chroma PV29). Though named as a red pigment, the sample we encountered of PR88 was a grape color.

Resources

PR88 pigment data from David G. Myers, The Color of Art Pigment Database, Artiscreation.com

Information about PR88 from Bruce MacEvoy, Handprint Guide to Watercolors,

Stats

Lightfastness

Very Good but may be Variable

This may fade in tints with white (BWS 7 instead of 8). Sources were divided on PR88. Some said it was excellent while Bruce MacEvoy’s tests showed variability between brands.

Transparency

Semi-Transparent, Transparent

Sources vary somewhat on transparency level

Toxicity

Lower Concern

Source artiscreation where there is more information. As with all pigments and paints, we recommend proper studio safety protocols.

Particle Size

Cubic

Chemical Name

Indigoid, Thioindigoid

C₁₆H₄Cl₄O₂S₂

with PR88 (Thioindigoid Violet)

No single-pigment Oil found with PR88

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