Christmas tree color matching knowledge introduction
The Christmas material sample is composed of three colors of green, yellow and black, and can be based on the existing pigments special yellow, permanent yellow, fluorescent yellow, Vc802 green, phthalocyanine green, carbon black light resistance, heat resistance, weather resistance, migration resistance. The lower limit of chemical resistance and chemical resistance, electrical insulation, toxicity, tinting strength, hiding rate, dispersibility, coloring cost, etc., and then refer to the use of the product.
Reasonable selection of pigments, according to which three kinds of pigments: phthalocyanine green, extra yellow, and carbon black are selected. How to determine the concentration of pigments is not an easy task. The following measures can be taken: First, the pigments can be determined according to reference materials and accumulated experience. Concentration. The second is to compare the coloring reference with the sample, find out the color similar, and then determine the concentration of the pigment. We can’t use the first two measures, so we have to use the third measure – the coloring method. First, phthalocyanine green, special yellow, and carbon black are evenly mixed together in different proportions, and the plasticizer dioctyl phthalate is used. Adjust into a paste that is easy to flow and disperse, spread the prepared paste evenly on the base material sheet, find out the similar coating samples, and determine the approximate concentration of the pigment as phthalocyanine green 10 abalone, special yellow 45g, carbon black 50g.
When using the Xu color method, the pigment can not be adjusted to be too thin or too thick, the former is unfavorable for observation, the latter has poor dispersion and uneven Xu layer. The thickness of the Xu layer is suitable to just cover the base material sheet. Using the Xu color method to determine the concentration of the pigment has a large error, and the method is not easy to master. When formulating a color formula, you should pay attention to some color matching skills: the secondary color should not be combined with its complementary color, otherwise the color will be dull. When color matching, you should not only pay attention to the color matching, but also pay attention to the color matching.
When color matching, pigments with similar properties should be selected as far as possible, so as to avoid different heat resistance of the pigments and affect the color matching results. When color matching, try to use as few types of colors as possible, otherwise it will bring a lot of unnecessary trouble.
