Quinacridone dye

Description

A series of synthetic red and violet dyes composed of linear quinacridones that are made from terephthalic acid. Quinacridone dyes can exist in four crystalline allotropes, two of which are sold as red and violet pigments. Although synthesized in 1896, quinacridone colors were first recognized as useful pigments by W. Struve at DuPont in 1955 and marketed in 1958 under the name Monastral. These lightfast colorants are used in paints, printing inks, and plastics.

Synonyms and Related Terms

colorante de quinacridona (Esp.)

Examples include:

Red - Monastral red [DuPont; Acra red [Liquitex]; Acra crimson [Binney and Smith]; Bocour red [Bocour Artist Colors];Thalo Red Rose

Violet - Monastral violet, Pigment Violet 19; CI 46500;

Other Properties

Resistant to alkalis and heat.

Composition	violet- C20H12N2O2
Density	1.5
Refractive Index	2.02 - 2.04

Authority

• R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966

• G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 611

• Reed Kay, The Painter's Guide To Studio Methods and Materials, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1983

• Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)

• Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993

• Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986

• Monona Rossol, The Artist's Complete Health and Safety Guide, Allworth Press, New York, 1994

• Encyclopedia Britannica, http://www.britannica.com Comment: "chemical compound." Encyclopædia Britannica. 2005. Encyclopædia Britannica Premium Service 7 Apr. 2005 .

• Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000

• Website address 1 Comment: www.handprint.com