Series number: 4 Chemical description: Cadmium zinc sulfide, Cadmium sulfoselenide Color index name: PY 35, PO20 Color index number: 77205, 77199 Permanence rating: A(ii) ASTM lightfastness rating: I Transparency/Opacity: O Granulating/Staining: St The colours are chosen according to mass tone (colour from tube), undertone (bias of colour when in a thin film), colour strength, relative opacity and the character of the pigment in watercolor, ie. granulating, staining or even wash. The resultant colour spectrum ensures the largest number of colours can be mixed from the range.

The optimum brilliance of every colour in the Artists' Water Colour range is unparalleled by any other watercolor. Remarkably, this brilliance is combined with high permanence.

Please note: due to trading agreements we are unable to supply this product outside of the EU. However, we don't want to disappoint anyone, so please feel free to use code USA10 for 10% off your first order on any other brand.