Ultramarine blue

Ultramarine pigment is the oldest and brightest blue pigment, non-toxic, environmentally friendly, and falls under the category of inorganic pigments.

It is used for whitening, capable of eliminating the yellow light in white paint putty, white cement, and other construction materials or other white pigments. It is water-insoluble, alkali-resistant, and heat-resistant. It is extremely stable against sunlight and weathering in the atmosphere, but is not acid-resistant and will decompose and change color when exposed to acid.