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Phthalo Blue (GS) is just one of the bright and exquisite Professional Watercolours from A J Ludlow. Being based on a single pigment with excellent permanence and light fastness, ensures that this watercolour’s properties are exceptional. As with all our fine-art materials, Phthalo Blue (GS) watercolour is lovingly handmade in the UK by a skilled artisan from the best ingredients and finest pigments.
Phthalocyanine Blue (Green Shade) professional quality watercolour is supplied in a 15ml glass jar, because:
But more importantly, there is no need for unnecessary additives or formulation changes to make processing in our colour manufacturing workshop easier, allowing the Phthalo Blue (GS) watercolour made by A J Ludlow, to be at the highest pigment concentration and the pigment’s unique properties to be uncompromised. Anything less would be at odds with the brilliance and performance demanded of a professional quality watercolour range.
This Professional Watercolour is prepared using a synthetic aromatic macrocyclic organo-metallic pigment, β-copper phthalocyanine. The pigment has been selected for its purity, high tinctorial strength, exceptional transparency, light fastness and very attractive, green-shade blue hue. It therefore affords a transparent watercolour (as can be seen in the figure 1a below).
Figure 1: Assessment of (a) the opacity/transparency and (b) staining power of A J Ludlow Phthalo Blue (GS) Professional Watercolour*.
The Phthalo Blue (GS) watercolour does not lift out completely (as can be seen in figure 1b above) and so has a propensity to stain the watercolour paper.
This watercolour has a structured consistency, but is easily transferred from the jar to the watercolour palette using a clean spatula or palette knife. As with all the Professional Watercolours from A J Ludlow, once water is added, this watercolour has excellent flow and is a joy to paint with.
As the Phthalo Blue (GS) Professional Watercolour is based on an organic pigment, it paints out smoothly and in graduated washes, its colour goes from almost a rich deep blue at full strength to an attractive clean and transparent greenish blue. The pigment has a high tinctorial strength and so is best used sparingly when initially mixing with other colours.
On the artist’s palette, Phthalocyanine Blue (Green Shade) watercolour can be used as a cool primary blue.
Pigment Details: Beta (β) – Copper Phthalocyanine / Colour Index Pigment Blue 15:4 ( C.I. PB15:4)
Footnote:
*Details of how each watercolour is tested are given in the May 2021 ARTicle “Testing and Assessing the Properties of Watercolours – Part 1 ” (see also Part 2 of the ARTicle, which was published in June 2021).