Naphthol Red DK

PR5

Alternate Names

Naphthol ITR

Permanent Red

Permanent Carmine

Pigment Description

Naphthol Red DK. (One of several Napthol reds). Moderate to inadequate lightfastness. We were surprised to see this color found in a currently available Cadmium Red Imitation hue by a major art supplier, and they listed good lightfastness. Perhaps they found a better source for the pigment, but it might be worth doing one's own lightfastness tests.

This is another case where Monona Rossol's work about potential serious health issues that could arise, such as methemoglobinemia, so please consult her writing on pigments.

Resources

PR5 pigment data from David G. Myers, The Color of Art Pigment Database, Artiscreation.com

General information about this class of pigments from Handprint,

Rossol, Monona. The Artist's Complete Health and Safety Guide. New York, NY : Allworth Press, 2001. The book is rather dated, updated information is available from her website.

Stats

Lightfastness

May be Moderate to Good

This paint is known to fade to a BWS 5 in tints which is too low for us. Thought to be ASTM II but would not consider 5's to be very good.

Transparency

Semi-Transparent

Toxicity

Thought to be category of lesser concern

Treat all pigments and paints with studio safety protocols.

Chemical Name

Monoazo, 3-hydroxy-2-naphthanilide, ITR

Dry Pigments listing PR5

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