ultramarine violet pigment

the ultramarine violet pigment, from england, is a polysulfurized sodium aluminosilicate which gives a deep and vivid purple violet. It is compatible with all binders and all techniques. Be careful, however, with lime, like the ultramarine blue pigment, the ultramarine purple pigment mixed with the lime must be used during the day, otherwise it may lose its color and make walls in degraded colors because of the alkalinity of the lime that eats it. In lime a mixture of 30% of the weight of lime paste will give a sustained but soft and fresh color. This pigment mixes quite well in water with a little 95 ° household alcohol.