All Pigments
Colour Index Code
PR170
Naphthol Red
- Chemistry
- Azo naphthol
- Origin
- Synthetic organic.
- History
- A bright, warm red introduced mid-20th century.
- Toxicity
- Non-toxic.
Naphthol Red (PR170) is Azo naphthol. In our watercolour range it is semi-transparent, yes granulation, excellent lightfastness.
- Transparency
- Semi-Transparent
- Granulation
- YES
- Staining
- Medium
- Lightfastness
- Excellent
PR170: Questions & Answers
What is PR170?
PR170 (Naphthol Red) is Azo naphthol. Synthetic organic..
What is the chemistry of PR170?
PR170 is Azo naphthol.
Is PR170 toxic?
Non-toxic.
Is PR170 lightfast?
In the Michael Harding range, colours using PR170 are rated excellent for lightfastness.
Is PR170 transparent or opaque?
PR170 is semi-transparent.
Does PR170 granulate?
In watercolour, PR170 is granulating.
Which Michael Harding colours use PR170?
PR170 appears in 3 Michael Harding colours: Amber, Scarlet Lake, Scarlet Lake.
Michael Harding colours using PR170
3 colours across both rangesLightfastness: ExcellentOil Colours containing PR170
2 colours
Watercolours containing PR170
1 colour
| Colour | Medium | Transparency | Lightfastness | Granulation |
|---|---|---|---|---|
| Amber No. 256 | Oil | Semi-Transparent | Excellent | — |
| Scarlet Lake No. 205 | Oil | Semi-Transparent | Excellent | — |
| Scarlet Lake W153 | Watercolour | Semi-Transparent | Excellent | YES |
scroll for more →
Compare
Pigments in the same family
Mix with
Complementary pigments to mix with PR170
Opposite-family pigments that pair cleanly with PR170 for neutrals, shadows and chromatic greys.
Open the Mixing Studio →