Rubine Reds

An organic color pigment used in printing inks. Rubine 2B comprises a variety of shades which owe their color to either the presence of sodium (medium red), barium (bright, yellow red), calcium (very blue red), strontium (lighter blue red), or manganese (scarlet) salts. The Rubine 2Bs possess moderate degrees of lightfastness and resistance to acids and solvents. They have good resistance to heat and oil, and are not resistant to alkalis. They are economical, however, and are widely used in a variety of different ink formulations and applications. The colors are clean and have excellent flow and workability properties. Varieties of Rubine Reds containing barium have been essentially discontinued due to their toxicity, and strontium-based shades are also infrequently used. (See also Organic Color Pigments.)

Also known as Permanent Red 2B and BON Reds. (CI Pigment Red 48 No. 15865; CI Pigment Red 48 [sodium]; CI Pigment Red 48:1 [barium]; CI Pigment Red 48:2 [calcium]; CI Pigment Red 48:3 [strontium]; CI Pigment Red 48:4 [manganese].)

Rubine Red 6B is a bluish red (bluer than Lithol Rubine 4B), with poor chemical resistance properties, but high brightness, purity, and tinctorial strength.

('CI Pigment Red 200 No. 15867'.)

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