blue pigments. lavender blue pigment, ultramarine blue pigment, lime blue pigment, sky blue pigment, cobalt blue pigment, medium ultramarine blue pigment.Pigments are particles of fine material which have the function of modifying the colour of paints, coatings, mortars, lime or concrete, in which they are diffused. There are natural pigments and synthetic pigments. According to each pigment we will have a more or less strong colouring power. The colour of the binder will also have an influence on the final shade.
lime blue pigment is a polysulphurized sodium aluminosilicate (synthetic metal oxide fixed on a mineral base). Its color is rather purplish primary lavender blue. this pigment is compatible with all techniques and all binders. However, to dilute it, it will be necessary to add to it in addition to water a little household alcohol at 95 ° and liquid black soap.
the sky blue pigment is a mixture with a copper phthalocyanine which gives a primary light blue tone that is slightly green and quite soft, pastel. Compatible with all techniques and binders, only not suitable in flour paint, ocher paint because it changes color during cooking. Requires a little household alcohol at 95 ° to promote its dilution in water.
the lavender blue pigment is a mixture of sodium aluminosilicate giving a light lavender blue color, slightly purplish. 75% natural pigment, mixes well in water binders. A dosage of 15% of the weight of lime paste, whitewash, gives a very soft pale lavender color. It is possible to further increase the dosage to have a more sustained shade up to about 30%
the dark ultramarine blue pigment is a polysulfurized sodium aluminosilicate, an imitation of lapis lazuli, which gives a slightly purplish navy blue color. Equivalent to majorelle blue or guimet blue (its creator) or klein blue. It can be used in all techniques and all binders, however with lime or cement the paint or the plaster must be used during the day.
the medium ultramarine blue pigment is lighter and less purplish than the dark ultramarine blue pigment. It is compatible with all binders and all painting and coating techniques. A dosage in the lime paste at 20% of the lime weight will give a beautiful lavender blue, fairly sustained and more purplish than the lavender blue pigment. To mix it in water, it will be necessary to add a little liquid black soap and a little 95 ° household alcohol.
the ercolano blue pigment is an organic pigment fixed on a carbonate and a sulfate. its color is quite bright sky blue. It is compatible with all binders and all techniques. A dosage in the lime paste at 25% of the weight of the lime gives a bright and fresh sky blue color reminiscent of the colors used on the seaside. This pigment mixes perfectly well in water.