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Title : Unraveling Color Pigment Terms
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Unraveling Color Pigment Terms

Organic / Inorganic

Pigments are divided into organic (containing carbon) and inorganic (without carbon). 

Inorganic pigments were traditionally made from natural earths such as the ochers and siennas, and the hard minerals such as azurite and lapis lazuli, plus metals such as cadmium, cobalt, iron, and zinc. They are more opaque, denser, and generally weaker in tints than inorganic pigments. 

Organic pigments were originally made from plant materials, such as root madder, or animal materials such as cochineal. Organics tend to be more transparent, lighter in weight, and higher in tinting strength. 

Synthetic pigments

Both organic and inorganic pigments can be manufactured artificially in the lab, and the resulting pigments are for the most part indistinguishable from their natural counterparts. 

So, for example, ultramarine is a synthetic replacement for the rare and expensive mineral lapis lazuli. The properties are identical, but the price has become so low that it's used in low cost children's paint. 

Light / Deep

When a color is called "light" or "deep," it doesn't only mean light or dark in value. It also has to do with the position on the hue circle. Cadmium yellow deep is more toward red, really orange, while cadmium yellow light is not only lighter in value but also more toward the green side of yellow. 

Convenience Colors / Hue

Some pigments are blended to make colors with familiar names such as “mauve” or "peacock blue." Convenience mixtures fill gaps by offering intermediate mixtures for which no pigment exists, such as phthalo yellow-green. In watercolor, Payne’s gray is a blue-black made from black and ultramarine or other blends. 

When a color is called a "hue," such as "cerulean blue hue," it's a color that resembles its expensive counterpart, but it's made of a blend of inexpensive ingredients.

Designers Colors

The term "designers color" has been used for a paint color that is meant to match a particular color note. A designers color is made to match not only a hue, but a particular tint or shade and a level of chroma or saturation. Designers colors are often mixed with white to result in colors like "pale rose blush" and "cobalt turquoise light." House paints and hobby acrylics frequently are formulated in this way because people use them right out of the bottle for a given use.

Nowadays most manufacturers of artists' pigments use pure pigments and let you do the adjusting, because you may not want the white in the mixture from the beginning. So if a pigment is naturally transparent, it will still be transparent, even in gouache. 

Permanent / Lightfast

The word “permanent” appears on many different art products, but it’s a confusing term. On some graphic art products, such as inks or felt-tipped markers, it really means “waterproof,” rather than “lightfast” (resistant to fading). Many calligraphy or fountain pen inks are not waterproof, but they’re reasonably lightfast, considering that most handwriting isn’t usually subjected to light for long periods.

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Learn more:

Color terms explained on the website Handprint

Color of art pigment database listed by pigment numbers on website ArtisCreation

Signed copies of my book Color and Light: A Guide for the Realist Painter

Did I get something wrong, or do you have something to add? Please let me know in the comments.

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