All Pigments
Colour Index Code
PR188
Naphthol Red AS
- Chemistry
- Azo naphthol (Naphthol AS)
- Origin
- Synthetic organic.
- History
- A warm, lightfast naphthol red.
- Toxicity
- Non-toxic.
Naphthol Red AS (PR188) is Azo naphthol (Naphthol AS). In our watercolour range it is semi-opaque, no granulation, excellent lightfastness.
- Transparency
- Semi-Opaque
- Granulation
- NO
- Staining
- Medium
- Lightfastness
- Excellent
PR188: Questions & Answers
What is PR188?
PR188 (Naphthol Red AS) is Azo naphthol (Naphthol AS). Synthetic organic..
What is the chemistry of PR188?
PR188 is Azo naphthol (Naphthol AS).
Is PR188 toxic?
Non-toxic.
Is PR188 lightfast?
In the Michael Harding range, colours using PR188 are rated excellent for lightfastness.
Is PR188 transparent or opaque?
PR188 is semi-opaque.
Does PR188 granulate?
In watercolour, PR188 is non-granulating.
Which Michael Harding colours use PR188?
PR188 appears in 2 Michael Harding colours: Napthol Red, Scarlet Lake Light.
Michael Harding colours using PR188
2 colours across both rangesLightfastness: ExcellentOil Colours containing PR188
1 colour
Watercolours containing PR188
1 colour
| Colour | Medium | Transparency | Lightfastness | Granulation |
|---|---|---|---|---|
| Napthol Red No. 301 | Oil | Semi-Transparent | Excellent | — |
| Scarlet Lake Light W205 | Watercolour | Semi-Opaque | Very Good | NO |
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