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    Home > Coatings News > Paints and Coatings Market > Coating process: normal appearance and inspection of common building coatings

    Coating process: normal appearance and inspection of common building coatings

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tips: 1 Varnishes ① Appearance: transparent, light color, appropriate consistency, light color and high transparency are the top products, but phenolic varnish is transparent oily liquid, light yellow, brown and yellow brown; alkyd varnish is light red brown transparent oily liquid ② Test method: if there is precipitation, turbidity and thickening, it indicates that the coating quality has changed Take a small number of samples and observe the effect, or put a small number of samples into the colorimetric tube to compare with the standard solution with different turbidity for identification 2 lacquer (1) Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Paint Home News: 1 Varnish class ① appearance: transparent, light color, appropriate consistency, light color, high transparency as the top product, but phenolic varnish is transparent oil-like liquid, color is light yellow, brown and yellow brown; alkyd varnish is light red brown transparent oil-like liquid ② Test method: if there is precipitation, turbidity and thickening, it indicates that the coating quality has changed Take a small number of samples and observe the effect, or put a small number of samples into the colorimetric tube to compare with the standard solution with different turbidity for identification 2 Lacquer ① appearance: milky white or grayish yellow thick liquid with strong acid flavor ② Test method: dip a small wooden stick in a small amount of raw paint and pull it into 11 cm long silk After breaking, the silk head quickly rolls up, which is not easy to penetrate on the surface of wool paper After brushing, the color changes from white to red, from red to purple Finally, the paint film with high hardness and good brightness is qualified 3 Diluent type ① appearance: it shall be water white transparent liquid, free of peculiar smell, impurities and other suspended substances The normal alkyd diluent should have the mild alcohol taste of butanol, while the nitro diluent should have the banana taste ② Test method: drop a little diluent on the filter paper, wait for a moment, check whether there are residual impurities, good diluent is volatile, and there is no trace of residue on the volatile paper surface; in addition, mix a proper amount of diluent with matching resin or coating to observe whether its solubility is good 4 Appearance of water-based coating ①: there is a layer of transparent glue a liquid after the slurry is precipitated, without turbidity It has a private taste by twisting and grinding with fingers After mixing, the color is even, with normal slurry smell ② Appearance inspection: in case of flocculation and turbidity and abnormal smell, appropriate amount of paint can be applied to observe the effect directly 5 Appearance of oily paint ①: after the cover is opened, there is no or only slight skinning on the surface, which is a thin layer of diluent or oil It is thicker below, but it can be fully mixed, with uniform color and moderate a degree ② Test method: if the coating is skinned, thickened, precipitated or thickened, and the quality does change, mix the coating with a small stick, and then pick up the coating with a small stick for observation The free falling of the coating wire shall not be interrupted, otherwise, the coating has been gelled and deteriorated 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,
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