Winsor Blue, otherwise known as Phthalo Blue is a deep, intense blue which approaches black in mass tone and has either a red or green undertone leading to the variations of Winsor Blue (Red Shade) or Winsor Blue (Green Shade). It has great tinting abilities, is transparent and completely permanent. Made from the organic synthetic pigment copper phthalocyanine, which is part of a collection of colors that were first chemically synthesized in the late 1920s, Winsor Blue was one of only three colors that were universally accepted for their artist quality.

Series number: 1 Chemical description: Copper Phthalocyanine Color index name: PB 15 Color index number: 74160 Permanence rating: A ASTM lightfastness rating: II Transparency/Opacity: T Granulating/Staining: St

The colors are chosen according to mass tone (color from tube), undertone (bias of color when in a thin film), color strength, relative opacity and the character of the pigment in water color, ie. granulating, staining or even wash. The resultant color spectrum ensures the largest number of colors can be mixed from the range.

The optimum brilliance of every color in the Professional Water Color range is unparalleled by any other water color. 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.