Difference between revisions of "Hansa red"
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toluidine red; Pigment Red 3; CI 12120 | toluidine red; Pigment Red 3; CI 12120 | ||
| − | [[[SliderGallery rightalign|PR3 kremer 23950.TIF~FTIR (MFA)]]] | + | [[[SliderGallery rightalign|PR3 kremer 23950.TIF~FTIR PR3(MFA)|PR004 Hansa Red R (Tate).PNG~FTIR PR4(MFA)]]] |
| + | == Comparisons == | ||
| + | |||
| + | {| class="wikitable" | ||
| + | ! Pigment number !! Manufacture !! Pigment name !! Manufacture CI number !! Comments | ||
| + | |- | ||
| + | | PR003 || Kremer || || unknown || | ||
| + | |- | ||
| + | | PR004 || unknown|| Hansa red R (beta-napthol) || unknown || | ||
| + | |- | ||
| + | |} | ||
== Other Properties == | == Other Properties == | ||
Revision as of 09:15, 3 March 2020
Description
Originally a Hoechst AG trademark for a line of bright, transparent red synthetic organic pigments. Hansa reds, also called toluidine reds, are based on the reaction of beta-naphthol with 2-nitro-4-toluidine. Toluidine red was first synthesized in 1905. In general, toluidine reds have fair lightfastness and weather resistance, and they have a tendency to bleed. They are used in industrial coatings for air-dried and baked enamels and auto finishes. Toluidine reds are also used in wax crayons, pastels and watercolors.
See also Hansa.
Synonyms and Related Terms
toluidine red; Pigment Red 3; CI 12120
.PNG)
Comparisons
| Pigment number | Manufacture | Pigment name | Manufacture CI number | Comments |
|---|---|---|---|---|
| PR003 | Kremer | unknown | ||
| PR004 | unknown | Hansa red R (beta-napthol) | unknown |
Other Properties
Soluble in many organic solvents. Resistant to acid, alkali and soap.
Hazards and Safety
Ingestion can cause cyanosis. Suspected carcinogen.
Sources Checked for Data in Record
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
- Monona Rossol, The Artist's Complete Health and Safety Guide, Allworth Press, New York, 1994
- 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