These oil pastels are perfect for older or more advanced students. They are intense in color and particularly soft and pleasant to use, not just on paper and board but also on wood or earthenware.
Color Swatch created using heavy to light application and was applied on 100 lb (163 gsm) drawing paper material.
This Naphthol Red is an intense scarlet red pigment that is heavily staining. It has an average drying time. It is semi-transparent and has relatively poor covering power.
This Naphthol Red has been rated as having excellent lightfastness under ASTM testing, but other testing methods have demonstrated some tendancy for the color to fade with exposure to strong ultraviolet light. It has been considered a replacement for less lightfast naphthol reds such as PR3. Not suitable for exterior use.
Naphthol Reds are not considered toxic. Naphthol Red AS-D may cause eye, skin, or respiratory irritation. Contact with dry pigment should be avoided.
Naphthal, Naphthol Bordeaux, Naphthol Carbamide, Naphthol Carmine, Permanent Carmine, Permanent Red, Fanchon Red.
Indanthren Brilliant Orange is insoluble in water.
The lightfastness of anthraquinone vat dyes is consdered to be good, and may be improved upon by the use of protective coatings to avoid exposure of the dye to oxygen.
No information is available.
Indanthren Brilliant Orange has been used as a vat dye for textiles.
Helio Brilliant Orange, Indanthrene Brilliant Orange, Vat Orange
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