Difference between revisions of "Naphthol pigment"
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== Description == | == 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 [[ | + | 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 when they were produced by IG Farben (Berrie and Lomax 1997). Later, a series of naphthol reds, called American Naphthol Reds, was introduced to the United States in the 1940s (Berrie an Lomax 1997). 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 napthol pigment]]. | ||
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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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| | + | [[[SliderGallery rightalign|PR5 Monolite Red CB.PNG~FTIR PR5 (MFA)|PR9 kremer23290-b.TIF~FTIR PR9 (MFA)|PR017sun naphtol red medium 235-7515.TIF~FTIR PR17 (MFA)|PR022 sun naphthol red light 235-7511 (with kaolin).TIF~FTIR PR22 (MFA)|PR023 Sun Naphthol red dark.PNG~FTIR PR23 (MFA)|PR146 naphthol Red FFB (magruder ra1308-dc).TIF~FTIR PR146 (MFA)|PR170 sun naphthol red 235-0170.TIF~FTIR PR170(MFA)|PR266 Naphthol Red.PNG~FTIR PR266 (MFA)|PR268 Naphthol Red.PNG~FTIR PR268 (MFA)|PR269 Naphthol Red.PNG~FTIR PR269 (MFA)]]] |
| − | + | == Comparisons == | |
| − | == | ||
| − | |||
| − | = | + | {| class="wikitable" |
| + | ! Pigment number !! Manufacture !! Pigment name !! Manufacture CI number !! Comments | ||
| + | |- | ||
| + | | PR005 || unknown|| monolite red CB|| unknown || | ||
| + | |- | ||
| + | | PR009 || Kremer|| unidentified|| 23290 || | ||
| + | |- | ||
| + | | PR017 || Sun|| naphthol red medium|| 235-7515 || | ||
| + | |- | ||
| + | | PR022 || Sun|| naphthol red light|| 235-7511 || | ||
| + | |- | ||
| + | | PR022 || Magruder|| naphthol red light shade|| ra1307-dc || | ||
| + | |- | ||
| + | | PR023 || Sun|| naphthol red dark|| 235-7575 || | ||
| + | |- | ||
| + | | PR146 || Magruder|| naphthol red FFB|| ra1308-dc || | ||
| + | |- | ||
| + | | PR170 || Sun|| naphthol red|| 235-0170 || | ||
| + | |- | ||
| + | | PR170 || Kremer|| naphthol red|| 23290-a || | ||
| + | |- | ||
| + | | PR266 || Magruder|| naphthol red medium shade|| ra1014-dc || | ||
| + | |- | ||
| + | | PR268 || Magruder|| naphthol red warm light shade|| ra1012-dc || | ||
| + | |- | ||
| + | | PR269 || Magruder|| naphthol red bluish dark shade|| ra1087-dc || | ||
| + | |- | ||
| + | |} | ||
| − | + | == Physical and Chemical Properties == | |
| − | + | Resistant to acid, alkali and soap. | |
| − | + | == Resources and Citations == | |
| + | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 Comment: Napthol AS = azoic coupling 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 | * 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 | * 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 | * ''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." (Accessed 13 May 2004). gives date of first use as 1912 | |
| − | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "Chemical Compound." | ||
| − | |||
* 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 | * 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 | ||
Latest revision as of 10:19, 24 May 2025
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 when they were produced by IG Farben (Berrie and Lomax 1997). Later, a series of naphthol reds, called American Naphthol Reds, was introduced to the United States in the 1940s (Berrie an Lomax 1997). 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 napthol 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.);
Comparisons
| Pigment number | Manufacture | Pigment name | Manufacture CI number | Comments |
|---|---|---|---|---|
| PR005 | unknown | monolite red CB | unknown | |
| PR009 | Kremer | unidentified | 23290 | |
| PR017 | Sun | naphthol red medium | 235-7515 | |
| PR022 | Sun | naphthol red light | 235-7511 | |
| PR022 | Magruder | naphthol red light shade | ra1307-dc | |
| PR023 | Sun | naphthol red dark | 235-7575 | |
| PR146 | Magruder | naphthol red FFB | ra1308-dc | |
| PR170 | Sun | naphthol red | 235-0170 | |
| PR170 | Kremer | naphthol red | 23290-a | |
| PR266 | Magruder | naphthol red medium shade | ra1014-dc | |
| PR268 | Magruder | naphthol red warm light shade | ra1012-dc | |
| PR269 | Magruder | naphthol red bluish dark shade | ra1087-dc |
Physical and Chemical Properties
Resistant to acid, alkali and soap.
Resources and Citations
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993 Comment: Napthol AS = azoic coupling 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." (Accessed 13 May 2004). gives date of 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