Ultraviolet

In some cases, firms specify paint consumption (Coverage) in meters square with one kilogram (liter) of paint. In addition, the importance of such properties are the pigment density, which ranges from 0.5 g / cc. (Soot) to 9.55 g / cc. (Red lead), rate color, coloring power, the ability to zauklyuchayuschayasya share their pigment hue mixed with white pigment; svetoustoychivost, harmless to health; alkali resistance (exterior paint); corrosion resistance, etc. Color - Property bodies produce a certain visual sensation according to the spectral composition and intensity of reflected or emitted by their visible light. The main qualities of color - hue, saturation and lightness. Color coatings depends mainly on the color pigments, fillers and binders.

Color is the visual and instrumental methods (GOST 16873-78). Luster - the ability to surface of the directionally reflected light beam. Gloss paint set by the photoelectric method. The essence of the method consists of measuring the photocurrent excited in a photodetector a beam of light reflected from the surface of the test coverage. Light resistance - ability of material to maintain its color under the action of light rays.

In the operation of coating materials change their color under the ultraviolet rays of natural light and artificial light sources that emit ultraviolet rays. Coating materials prefabrication - ready for paint and varnish materials, and as pigments, binders and other materials constituting the paint film to be lightfast. This is especially important for exterior paint facades and roofs of buildings (such as enamel KO-168), open metal structures. In paints and inorganic pigments determine the conditional lightfastness (GOST 21903-76). Weathering - Paint property to resist the destructive action sunlight, rain, frost, snow, wind and other weather factors (eg, gases and dust, contaminating the lower atmosphere). To determine the weather resistance (GOST 6992-68) with the samples kept in the lacquer coating atmospheric conditions, followed by quantification of resistance of the coating to change the decorative and protective properties.