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2. Metallic color - Wikipedia

   en.wikipedia.org/wiki/Metallic_color

   Such colors "are made from a combination of different pigments and aluminum flakes that have different weights and particle sizes". [2] Crayon-maker Crayola has manufactured several lines of "metallic" products, including "Metallic FX" crayons, [3] and "Metallic Colors" colored pencils, which have flecks of sparkles to achieve the metallic effect.

3. List of inorganic pigments - Wikipedia

   en.wikipedia.org/wiki/List_of_inorganic_pigments

   Cerium pigments. Cerium sulfide red (PR265). Iron oxide pigments. Sanguine, Caput mortuum, Indian red, Venetian red, oxide red (PR102). Red ochre (PR102): anhydrous Fe 2 O 3. Burnt sienna (PBr7): a pigment produced by heating raw sienna. Lead pigments. Minium (pigment): also known as red lead, lead tetroxide, Pb 3 O 4. Mercury pigments ...

4. Pigment - Wikipedia

   en.wikipedia.org/wiki/Pigment

   Pigments for sale at a market stall in Goa, India. A pigment is a powder used to add color or change visual appearance. Pigments are completely or nearly insoluble and chemically unreactive in water or another medium; in contrast, dyes are colored substances which are soluble or go into solution at some stage in their use.

5. Iron oxide - Wikipedia

   en.wikipedia.org/wiki/Iron_oxide

   Iron oxide pigment. The brown color indicates that iron is at the oxidation state +3. Green and reddish brown stains on a limestone core sample, respectively corresponding to oxides/hydroxides of Fe 2+ and Fe 3+. Iron oxides feature as ferrous or ferric or both. They adopt octahedral or tetrahedral coordination geometry. Only a few oxides are ...

6. Alumina effect pigment - Wikipedia

   en.wikipedia.org/wiki/Alumina_effect_pigment

   A dark color, for example, forms a high contrast to the bright light spots and strengthens the effect. Favorable is also the use of a covering varnish in order to achieve an optimal effect. [4] [6] The pigments can be applied with all painting techniques established for conventional pearlescent and interference pigments.

7. Hematite - Wikipedia

   en.wikipedia.org/wiki/Hematite

   Hematite has been sourced to make pigments since earlier origins of human pictorial depictions, such as on cave linings and other surfaces, and has been employed continually in artwork through the eras. In Roman times, the pigment obtained by finely grinding hematite was known as sil atticum.