Coating technology: selection of pigment in coating production

Core tip: it is very important to select the paint color according to the standard color card or template when selecting the color of the paint color It is difficult to mix the required color of paint if the paint color is not selected properly The following principles shall be followed in the selection of pigment: (1) The choice of color materials for the preparation of multi-color coating: most of the color matching of coating is to prepare multi-color coating, which requires several primary color materials When selecting, the primary color coating must be the color material with the same type, variety, performance, use, etc., which should be matched with each other and have good mutual solubility The diluent should also be matched with each other for auxiliary addition Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Paint Home News: when choosing the color materials for paint color matching, it is very important to choose the paint color materials after judging several color materials needed for color matching according to the standard color card or template It is difficult to mix the required color of paint if the paint color is not selected properly The selection of pigment should follow the following principles: (1) the selection of pigment for the preparation of multi-color paint: most of the color matching of paint is to prepare multi-color paint, and several primary color pigments are needed When selecting, the primary color coating must be of the same type, variety, performance, use and other color materials They should be matched with each other, with good mutual solubility The diluent should also be matched The addition of auxiliary additives should adapt to the principle that the selected color materials are allowed to be added Otherwise, it will not be able to form color or the color phase is not accurate The quality of the coating will suffer When using, the coating will be layered and insoluble or resin will be separated out, and the pigment will not be accurate Precipitation and so on The pigment should choose the pigment with good coloring power, covering power and pure color In general, transparent color matching uses color essence to color, while solid color matching uses color masterbatch to color (2) Color discrimination: the color chosen before color matching is placed under the standard natural light or standard light source with the standard color card or template, and the color phase, lightness and purity of the main color and the base color are compared and distinguished Whether the color materials are red, orange, yellow, green, green, blue, purple and other primary colors of coatings and pigments, if not, the color matching will not be accurate When a variety of color materials are used for color matching, floating color and turbidity are easy to occur due to the different density of the pigment Therefore, when selecting color materials, special attention should be paid not to select color materials with too large density difference If such a choice is really needed, silicon oil can be prepared for adjustment (3) Color contrast: if the color materials are selected correctly, a large area of sample plate and color card can be painted after color matching Comparison before drying is difficult to be accurate and consistent It is better to compare after drying, which will be accurate When there is a large amount of color matching, after the preparation, several standard samples shall be painted before use to recognize the color phase, lightness and purity For the adjusted transparent color, whether there is color difference with the wet sample provided by the customer can be judged by the following methods: in a light box glass On the flat plate, drop a proper amount of the wet sample and the adjusted wet sample on the flat glass respectively, and then use a scraper of 200 μ in 100 μ to scrape and smear two small samples at the same time After the light is on, observe If there is color difference between the adjusted small sample and the wet sample, continue to fine tune until it meets the requirements (4) Ideal color matching conditions: due to the limitation of the on-site environmental conditions, the color matching personnel must have some on-site color matching knowledge to facilitate the smooth completion of the work, and the on-site environmental light and lighting have visual differences on the actual operation In order to reduce the color difference caused by light, the following conditions shall be followed in color matching: A when there is no way to use standard light for color matching in the actual scene, in principle, the sun light shall be used, and between three hours after sunrise and three hours before sunset, direct sunlight shall be avoided, and color matching shall be conducted at the North window Because the direct sunlight is very strong, the reflected light of the colorimetric object is dazzling, and the normal judgment function of the eyes is lost, and the normal color matching is not possible b For the angle between light and observer, the colorimetric surface of color sample shall be illuminated vertically in principle, observed from an angle of about 45 degrees or from an angle of about 45 degrees, and observed from a vertical direction It can also be viewed from omnidirectional illumination, vertical direction or about 45 degrees angle But the reflection of light source image should be avoided c The toner should have normal color sense and ignore the diseases of nerve and omentum d In the spraying operation, sometimes it is impossible to move the color under favorable light, and usually the construction will be carried out in a specific place Only the field light source can be used for comparison, and the light source is limited, which will have an impact on the color person, so the color person should be observed more In order to achieve the best results Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,