Difference between revisions of "Lithol red"

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== Description ==
 
== Description ==
  
[BASF] A trademark for a series of bright red, metallic salts of a synthetic [http://cameo.mfa.org/materials/fullrecord.asp?name=azo%20dye azo dye]. First patented in 1899 by Paul Julius (BASF), Lithol reds are made by combining Tobias acid (2-naphthylamine-1-sulfonic acid) and beta-naphthol. Variations in colors are obtained by forming the salts with [http://cameo.mfa.org/materials/fullrecord.asp?name=sodium sodium], [http://cameo.mfa.org/materials/fullrecord.asp?name=barium barium], [http://cameo.mfa.org/materials/fullrecord.asp?name=calcium calcium], and [http://cameo.mfa.org/materials/fullrecord.asp?name=strontium strontium] cations.  Lithol reds are inexpensive and widely used in [http://cameo.mfa.org/materials/fullrecord.asp?name=printing%20ink printing inks], [http://cameo.mfa.org/materials/fullrecord.asp?name=crayon crayons], [http://cameo.mfa.org/materials/fullrecord.asp?name=enamel%2C%20organic enamels], stationery, and industrial paints. They are also used as a colorants in some [http://cameo.mfa.org/materials/fullrecord.asp?name=plastic plastics]. Lithol reds are not lightfast in sunlight and have only been used in student grade artists paints.  
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[BASF] A trademark for a series of bright red, metallic salts of a synthetic [[azo dye]]. First patented in 1899 by Paul Julius (BASF), Lithol reds are made by combining Tobias acid (2-naphthylamine-1-sulfonic acid) and beta-naphthol. Variations in colors are obtained by forming the salts with [[sodium]], [[barium]], [[calcium]], and [[strontium]] cations.  Lithol reds are inexpensive and widely used in [[printing ink|printing inks]], [[crayon|crayons]], [[enamel, organic|enamels]], stationery, and industrial paints. They are also used as a colorants in some [[plastic|plastics]]. Lithol reds are not lightfast in sunlight and have only been used in student grade artists paints.  
  
- Na salt: yellowish red, PR 49, CI 15630, water soluble  
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- Na salt: yellowish red, PR 49, CI 15630, water soluble  
  
- Ba salt: bluish pink, PR 49:1, CAS 1248-18-6
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- Ba salt: bluish pink, PR 49:1, CAS 1248-18-6
  
- Ca salt: bright red, PR 49:2, CAS 1103-38-4
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- Ca salt: bright red, PR 49:2, CAS 1103-38-4
  
- Sr salt: purplish red, PR 49:3, CAS 1103-39-5
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- Sr salt: purplish red, PR 49:3, CAS 1103-39-5
  
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
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Lithol toner; Pigment Red 49; CI 15630; 1-sulfo-beta-naphthalene-azo-beta-naphthol; Harrison Red
 
Lithol toner; Pigment Red 49; CI 15630; 1-sulfo-beta-naphthalene-azo-beta-naphthol; Harrison Red
  
[[[SliderGallery rightalign|PR49-1 Barium Lithol red.jpg~FTIR]]]
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[[[SliderGallery rightalign|PR049.1 sun barium lithol 210-4200.TIF~FTIR Ba Sun(MFA)|PR49-1 Barium Lithol red1.PNG~FTIR Ba Magruder(MFA)|PR049.2 sun calcium lithol red 211-4620.TIF~FTIR Ca red(MFA)|PR049.2 sun calcium lithol maroon 211-4980.TIF~FTIR Ca maroon(MFA)|PR49-2 Calcium Lithol red (magruder RL1082-dc).PNG~FTIR Ca Magruder(MFA)|PR49-2 Calcium Lithol red (magruder RL1348-dc).PNG~FTIR Ca y-s Magruder(MFA)]]]
 
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== Comparisons ==
== Other Properties ==
 
 
 
Poor lightfastness
 
  
 
{| class="wikitable"
 
{| class="wikitable"
 +
! Pigment number !! Manufacture !! Pigment name !! Manufacture CI number !! Comments
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|-
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| PR49:1 || Magruder || barium lithol red|| rl1204-dc ||
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|-
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| PR49:1|| Sun || barium lithol red || 210-2400 ||
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|-
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| PR49:2 || Magruder || calcium lithol red|| rl1082-dc ||
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|-
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| PR49:2 || Magruder || calcium lithol red y_s|| rl1348-dc ||
 +
|-
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| PR49:2  || Sun || calcium lithol red || 211-4620 ||
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|-
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| PR49:2  || Sun || calcium lithol maroon|| 211-4980 ||
 
|-
 
|-
! scope="row"| Composition
 
| C20H14N2O4S
 
 
|}
 
|}
  
== Hazards and Safety ==
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== Physical and Chemical Properties ==
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Poor lightfastness.  Composition = C20H14N2O4S
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== Risks ==
  
 
May cause allergic reactions. May be contaminated with cancer causing chemicals.
 
May cause allergic reactions. May be contaminated with cancer causing chemicals.
  
== Additional Information ==
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== Resources and Citations ==
  
º H. A. L. Standeven, "The History and Manufacture of Lithol Red, A Pigment Used by Mark Rothko in his Seagram and Harvard Murals of the 1950s and 1960s" ''Tate Papers'', Issue 10, 2008. [http://cameo.mfa.org/materials/ http://www.tate.org.uk/research/tateresearch/tatepapers/08autumn/harriet-a-l-standeven.shtm Link] º 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.
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* H. A. L. Standeven, "The History and Manufacture of Lithol Red, A Pigment Used by Mark Rothko in his Seagram and Harvard Murals of the 1950s and 1960s" ''Tate Papers'', Issue 10, 2008. [http://www.tate.org.uk/research/tateresearch/tatepapers/08autumn/harriet-a-l-standeven.shtm Link]  
  
== Authority ==
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* 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.
  
 
* R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966
 
* R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966
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* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
 
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
 
* 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
 
  
 
* Thomas Gregory, ''The Condensed Chemical Dictionary'', Reinhold Publishing, New York, 3rd ed., 1942
 
* Thomas Gregory, ''The Condensed Chemical Dictionary'', Reinhold Publishing, New York, 3rd ed., 1942

Latest revision as of 09:53, 30 October 2020

Description

[BASF] A trademark for a series of bright red, metallic salts of a synthetic Azo dye. First patented in 1899 by Paul Julius (BASF), Lithol reds are made by combining Tobias acid (2-naphthylamine-1-sulfonic acid) and beta-naphthol. Variations in colors are obtained by forming the salts with Sodium, Barium, Calcium, and Strontium cations. Lithol reds are inexpensive and widely used in printing inks, crayons, enamels, stationery, and industrial paints. They are also used as a colorants in some plastics. Lithol reds are not lightfast in sunlight and have only been used in student grade artists paints.

- Na salt: yellowish red, PR 49, CI 15630, water soluble

- Ba salt: bluish pink, PR 49:1, CAS 1248-18-6

- Ca salt: bright red, PR 49:2, CAS 1103-38-4

- Sr salt: purplish red, PR 49:3, CAS 1103-39-5

Synonyms and Related Terms

Lithol toner; Pigment Red 49; CI 15630; 1-sulfo-beta-naphthalene-azo-beta-naphthol; Harrison Red

FTIR Ba Sun(MFA)

PR049.1 sun barium lithol 210-4200.TIF

FTIR Ba Magruder(MFA)

PR49-1 Barium Lithol red1.PNG

FTIR Ca red(MFA)

PR049.2 sun calcium lithol red 211-4620.TIF

FTIR Ca maroon(MFA)

PR049.2 sun calcium lithol maroon 211-4980.TIF

FTIR Ca Magruder(MFA)

PR49-2 Calcium Lithol red (magruder RL1082-dc).PNG

FTIR Ca y-s Magruder(MFA)

PR49-2 Calcium Lithol red (magruder RL1348-dc).PNG

Comparisons

Pigment number Manufacture Pigment name Manufacture CI number Comments
PR49:1 Magruder barium lithol red rl1204-dc
PR49:1 Sun barium lithol red 210-2400
PR49:2 Magruder calcium lithol red rl1082-dc
PR49:2 Magruder calcium lithol red y_s rl1348-dc
PR49:2 Sun calcium lithol red 211-4620
PR49:2 Sun calcium lithol maroon 211-4980

Physical and Chemical Properties

Poor lightfastness. Composition = C20H14N2O4S

Risks

May cause allergic reactions. May be contaminated with cancer causing chemicals.

Resources and Citations

  • H. A. L. Standeven, "The History and Manufacture of Lithol Red, A Pigment Used by Mark Rothko in his Seagram and Harvard Murals of the 1950s and 1960s" Tate Papers, Issue 10, 2008. Link
  • 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.
  • R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
  • Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
  • Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979