Phthalocyanine Green (Blue Shade) is just one of the bright and exquisite Professional Watercolours made in the UK by A J Ludlow. Being based on a single pigment with excellent permanence and light fastness, ensures that this watercolour’s properties are exceptional. The pigment used in this watercolour, Copper polycloro-phthalocyanine has a bluish-green colour which is very similar in hue to Viridian (chromium (III) oxide dihydrate, C.I. pigment green 18) and is often used as a synthetic substitute, albeit in a fairly diluted mixture of pigment and other mineral fillers. In A J Ludlow’s Phthalocyanine Green (Blue Shade) Professional Watercolour, the pigment is pure and the tinctorial strength is very strong and so is best used sparingly when initially mixing with other colours.