Set colors may vary - The vendor may substitute a color within a set due to stock issues without notice.
Due to differences in users’ monitors, the colors presented are an approximation of the true color.
PW18-Calcium Carbonate
PBk28-Black Spinel
PW18-Calcium Carbonate
inorganic
calcium carbonate
CaCO3
Calcium carbonate, the mineral constituent of chalk, is a low tinting strength, inexpensive white pigment that is often used is a buffer and filler. Because of its low tinting strength, it is overwhelmed by other colors. It is used in gesso and other coatings to give the surface more tooth, a desirable characteristic for some painting techniques.
Calcium carbonate is lightfast. Like all carbonates, it reacts with strong acids
Naturally occuring chalk deposits have been mined since prehistoric times. Rocks and minerals that contain calcium carbonate include aragonite, calcite, vaterite, chalk, limestone. marble, and travertine. Calcium carbonate is the principle component of lime, used in many agricultural and industrial applications.
PBk28-Black Spinel
inorganic
copper chromite black
Black Spinel is a very neutral opaque black pigment, excellent for tinting to create neutral grays.
Black Spinel has excellent lightfastness.
Black Spinel is much more expensive than carbon-based blacks. Its use as a pigment has been limited to applications where a truly neutral black or gray tone is needed.