Difference between revisions of "Naphthol pigment"

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naphthol dye; azoic dye; Naphthol Red; Permanent Carmine; Grela Red; napthol dye (sp); hydroxynaphthoic anilide; Naphtol Anilid Saure (Deut.); Napthol AS (Deut.); pigment à base de naphtol (Fr.);
 
naphthol dye; azoic dye; Naphthol Red; Permanent Carmine; Grela Red; napthol dye (sp); hydroxynaphthoic anilide; Naphtol Anilid Saure (Deut.); Napthol AS (Deut.); pigment à base de naphtol (Fr.);
  
[[[SliderGallery rightalign|PR146 naphthol Red FFB (magruder ra1308-dc).TIF~FTIR PR146 (MFA)|PR017sun naphtol red medium 235-7515.TIF~FTIR PR17 (MFA)]]]
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[[[SliderGallery rightalign|PR146 naphthol Red FFB (magruder ra1308-dc).TIF~FTIR PR146 (MFA)|PR017sun naphtol red medium 235-7515.TIF~FTIR PR17 (MFA)|PR022 sun naphthol red light 235-7511 (with kaolin).TIF~FTIR PR22 (MFA)]]]
  
 
== Other Properties ==
 
== Other Properties ==

Revision as of 10:04, 7 January 2020

Description

A general class of azo-type organic colorants. Naphthol pigments contain a backbone of 2-hydroxy-3-naphthanilide (Napthol AS) and include many shades of red and some oranges. They were first patented in 1911 and sold as Grela Reds but did not become popularly used until the 1930s. About 6% of the red colorants used in 1985 were naphthol pigments. They provide good tinting strength and good lightfastness, but can bleed when exposed to organic solvents. Naphthol reds are used to color plastics, automotive finishes, architectural paints, pencils, crayon, printing inks and inexpensive artists oil paints and watercolors. See also Beta naphthol pigment.

Synonyms and Related Terms

naphthol dye; azoic dye; Naphthol Red; Permanent Carmine; Grela Red; napthol dye (sp); hydroxynaphthoic anilide; Naphtol Anilid Saure (Deut.); Napthol AS (Deut.); pigment à base de naphtol (Fr.);

FTIR PR146 (MFA)

PR146 naphthol Red FFB (magruder ra1308-dc).TIF

FTIR PR17 (MFA)

PR017sun naphtol red medium 235-7515.TIF

FTIR PR22 (MFA)

PR022 sun naphthol red light 235-7511 (with kaolin).TIF


Other Properties

Resistant to acid, alkali and soap.

Additional Information

B.Berrie, S.Q.Lomax, "Azo Pigments: Their History, Synthesis, Properties and Use in Artists' Materials" in Studies in the History of Art, No.57, National Gallery of Art, Washington DC, 1997.

Sources Checked for Data in Record

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993 Comment: Napthol AS = azoic couplic component
  • Hoechst Celanese Corporation, Dictionary of Fiber & Textile Technology (older version called Man-made Fiber and Textile Dictionary, 1965), Hoechst Celanese Corporation, Charlotte NC, 1990
  • Rosalie Rosso King, Textile Identification, Conservation, and Preservation, Noyes Publications, Park Ridge, NJ, 1985
  • Fairchild's Dictionary of Textiles, Phyllis G.Tortora, Robert S. Merkel (eds.), Fairchild Publications, New York City, 7th edition, 1996
  • Encyclopedia Britannica, http://www.britannica.com Comment: "Chemical Compound." Encyclopædia Britannica. 2004. Encyclopædia Britannica Premium Service. 13 May 2004 . gives date os first use as 1912
  • B. Berrie, S.Q. Lomax, 'Azo Pigments: Their History, Synthesis, Properties and Use in Artists' Materials', Studies in the History of Art , National Gallery of Art, Washington DC, No. 57, 1997 Comment: patented 1911

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