A J Ludlow Cobalt Green Professional Watercolour

Cobalt Green 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, Cobalt Green watercolour is lovingly handmade in the UK by a skilled artisan from the best ingredients and finest pigments.

Cobalt Green professional quality watercolour is supplied in a 15ml glass jar, because:

• The watercolour’s wet mass tone can be seen through the walls of the jar;
• The colour can be easily transferred from the jar to the palette with a palette knife.

But more importantly, there is no need for unnecessary additives or formulation changes to make processing in our colour manufacturing workshop easier, allowing the Cobalt Green 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 the inorganic mixed metal oxide spinel structured pigment, cobalt (II)/nickel (III)/zinc titanate, which gives the watercolour its bright and intense yellow-shade green colour excellent light fastness and opacity. It therefore affords an opaque watercolour, which is semi-opaque in thin washes (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 Cobalt Green Professional Watercolour*.

The Cobalt Green watercolour does not lift out completely (as can be seen in figure 1b above) and so has a propensity to stain the watercolour paper slightly.

This watercolour has a fluid consistency and is easily transferred to the watercolour palette using a clean spatula or palette knife.

Although containing cobalt and nickel, these metals’ bioavailabilty in the pigment used in our watercolour is very low and so the pigment is considered safe for use in our Professional watercolour range.

Pigment Details: Cobalt-Nickel-Zinc Titanate / Colour Index Pigment Green 50 ( C.I. PG50)

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).