Due to differences in users’ monitors, the colors presented are an approximation of the true color.
PR3-Toluidine Red
PR146-Naphthol Red
PR242-Pigment Red 242
PR178-Perylene Red
PR3-Toluidine Red
organic, monoazo
Toluidine Red is a semi-opaque, yellowish red pigment with high tinting strength.
Toluidine Red has very good lightfastness.
Toluidine Red or Toluidine Scarlet has been used in inks, textiles, artist materials, and plastics.
PR146-Naphthol Red
C33H27ClN4O6
Naphthol Reds vary widely in lightfastness. This Naphthol Red (PR146) has fair to poor permanence and always fades in tints. It is not suitable for outdoor use.
Unknown.
PR242-Pigment Red 242
organic, disazo condensation
A bright yellowish red, often referred to as scarlet. It has average tinting strength.
It has excellent resistance to solvents, acids, and alkali, and is heat stable up to 300°C. Disazo condensation compounds have very good lightfastness for organic pigments.
Pigment Red 242 is used to color plastics, paints, and printing inks.
PR178-Perylene Red
organic, anthraquinone
C48H26N6O4
Perylene Red is a moderately intense, semi-opaque, medium red pigment, appearing somewhere between a Cadmium Red and a Cadmium Deep Red hue. It has excellent brightness and tinting strength. Its partial transparency makes it useful as a glazing color.
Perylene Red has excellent lightfastness and permanence, but its tints may darken after extended exposure to sunlight. It is not considered suitable for exterior use.
Perylenes have been used as vat dyes since 1912, but they were not manufactured and sold as pigments until 1957.
ASIN #: B001E6K7KW