Phthalocyanine Blue (Red Shade)
Colour Number: 21
Pigment Details: Epsilon (ε) - Copper Phthalocyanine / Colour Index Pigment Blue 15:6 (C.I. PB15:6)
Phthalocyanine Blue (Red Shade) Professional Watercolour is prepared using the synthetic aromatic macrocyclic organo-metallic pigment, ε-copper phthalocyanine. The pigment has been selected for its purity, light fastness and intense red shade blue hue, making it ideal for use in A J Ludlow’s Professional watercolour range.
Copper phthalocyanine exhibits polymorphism (existing in different crystal forms), the three commercially important ones are alpha (α), beta (β) and epsilon (ε); traditionally, red shade phthalocyanine blues were prepared from α-copper phthalocyanine (C.I. PB15:1 and C.I. PB15:2), whilst green shade ones from the β-form (C.I. PB15:3 and C.I. PB15:4). The ε-form is redder in shade, more stable and has a higher tinting strength than α-copper phthalocyanine, making this pigment the best choice for a red shade phthalocyanine blue in A J Ludlow’s Professional watercolour range.
A J Ludlow’s Phthalocyanine Blue (Red Shade) Professional Watercolour has a high tinting strength and so is best used sparingly when initially mixing with other colours.
|Brand||A J Ludlow|