What are the paper pigments?
Blue pigments are mainly iron blue, cobalt blue, ultramarine and other varieties. Which group of large green production, ultramarine acid is not acid, bright and bright color, high temperature. Iron blue acid resistant alkali, hiding power, color strength is higher than the ultramarine, durability than the group of poor. Since the phthalocyanine blue into the market, because of its color strength than iron blue twice as high, other performance and good, so the amount of iron blue decreased year by year. Cobalt blue high temperature, light resistance is excellent, but the color strength and hiding power is slightly worse, the price is high, the use is limited.
Green pigments are mainly chromium oxide and lead chrome green two. Chromium oxide green light resistance, heat resistance, excellent chemical resistance, but the color is dark, color strength, hiding power are poor. Lead chromium green durability, heat resistance are less than chromium oxide green, but bright color, good dispersion, easy processing, due to toxic heavy metals, since the advent of phthalocyanine green and other organic pigments, the amount has been reduced.
Yellow pigment mainly iron yellow (hydrated iron oxide) and other varieties. The yellowish color is dark, but the durability, dispersibility, hiding power, heat resistance, chemical resistance, alkali resistance are very good, and the price is low, so widely used in building materials coloring.
Red pigment inorganic pigments in the red pigment, mainly iron oxide red. Iron oxide has a variety of different colors, from yellow to red, brown until black. Iron oxide is the most common iron oxide pigment. Has a good hiding power and color strength, chemical resistance, color retention, dispersion, the price is cheaper.
Black pigment is second only to white pigment important pigment. The main varieties are carbon black. The main quality indicators of pigment carbon black are blackness and hue.
