3, benzidine yellow tinting strength: pigment tinting strength also known as coloring strength. Characterizing the ability of a pigment to exhibit its own color when it is mixed with another pigment, the tinctorial power of the black pigment and the black pigment on white pigments are often measured on the basis of the red pigment. As the pigment's coloring power is based on the standard test method and its own standard sample of the coloring power compared to the so are used "% to said latex paint, the pigment is obviously required to paint the higher the better.

  4, benzidine yellow light fastness and weatherability: Pigment light fastness and weatherability is a measure of the applicability of paint in outdoor paint is an important indicator. Lightfastness mainly refers to the ability of the pigment to resist UV damage. The lightfastness of the pigment is based on the standard method to make it into a coating film. The lightfastness of the pigment, as measured by natural or artificial ultraviolet light irradiation, is expressed in the order of 1 to 8, the best of 8, and the worst of 1. External paint requirements of the color pigments used in light-resistant up to 7 or more. Weatherability refers to the ability of the pigment to accept atmospheric erosion. Outdoor paint pigments used to temporarily withstand sunlight, rain and atmospheric corrosion of harmful chemicals, the molecular chemical structure of a certain change, resulting in fading, darkening, and even lead to coating powder, aging and cracking, damage. Pigment weatherability reference external latex weathering test method. Weatherability rating of 1 to 5, 5 is the best. External latex paint requirements of the pigment used weathering resistance of 4.5 or more.

  5, benzidine yellow alkali resistance: pigment alkali resistance refers to the ability of pigments to resist alkaline chemicals erosion. Currently in the country, latex paint is mainly used as architectural coatings, the substrate for the cement mortar and concrete, alkaline heavier. Although the construction specification clearly specifies the need to finish the primer base paint, but the alkali resistance of the pigment is still very important, and of practical significance. This is just as the outer wall paint lacquer provides the technical requirements of alkali resistance, and the assessment of alkali resistance, including the coating discoloration description.

   6, non-toxic and pollution-free: At present, according to national regulations on indoor building decoration materials harmful substances limits within the paint used by latex paint should be non-toxic and pollution-free. Including soluble heavy metals (lead, chromium, cadmium) should not exceed the standard. For human health and environmental safety considerations, latex paint on the non-toxic pollution of the pigment will be higher and higher, the choice of beneficial to human health and environmentally friendly pigments, designers need to consciously and seriously The problem. The development of non-toxic pigments should be pigment industry an important direction.