Slate Black
PBk19
Alternate Name
Gray Hydrated Aluminum Silicate
Pigment Description
Slate Black or Slate Grey/Gray. We are weirdly enchanted by this color, as it is the basis for several off-the-beaten-path grey earth tones such as French Ardoise Gray. Made of Hydrated Aluminum Silicate or just "slate". It's fun to experiment with mixing the lighter forms of this pigment with lemon yellows. Monona Rossol mentions limits for respirable dust called PNOS, see her work for more.
Resources
PBk19 pigment data from David G. Myers, The Color of Art Pigment Database, Artiscreation.com,
Rossol, Monona. The Artist's Complete Health and Safety Guide. New York, NY : Allworth Press, 2001. The book is rather dated, updated information is available from her website.
Stats
Lightfastness
Excellent
Considered ASTM I, excellent.
Transparency
Semi-Opaque
Toxicity
Lower Concern
Treat all pigments and paints with studio safety protocols.
Chemical Name
Powdered Slate, hydrated aluminum silicate
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