Common knowledge of coating: how to avoid cracks in emulsion paint

Core tip: [news] in recent years, latex paint materials are still popular in the decoration industry At the same time, no matter in industrial and civil buildings, or in home decoration, there is a general phenomenon of even cracks in latex paint, which often occurs in about half a year of use, making the decoration effect much worse The cracks of emulsion paint often occur in the exchange (joint) of plywood base, gypsum board base and wood internal corner of ceiling and wall Due to the influence of climate and the large coefficient of thermal expansion and cold contraction of commonly used domestic decorative materials, in addition to the technical treatment and application of auxiliary materials during construction 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: [news] in recent years, latex paint materials are still popular in the decoration industry At the same time, no matter in industrial and civil buildings, or in home decoration, there is a general phenomenon of even cracks in latex paint, which often occurs in about half a year of use, making the decoration effect much worse The cracks of emulsion paint often occur in the exchange (joint) of plywood base, gypsum board base and wood internal corner of ceiling and wall Due to the influence of climate and the large coefficient of thermal expansion and cold contraction of commonly used domestic decorative materials, combined with the improper technical treatment and application of auxiliary materials during construction, the overall surface layer after decoration appears uniform full-length or irregular cracks From many years of work practice, the author has some experience in reducing or avoiding the cracks of emulsion paint by taking some effective treatment methods in the construction, hoping to play a reference role for colleagues 1) The surface of plywood base course shall be cleaned of floating ash, burr, fork and grease bag for finishing For the base course of gypsum plasterboard, first use a long ruler and a paper cutter to cut off both sides of the board joint at an angle of 30-45 degrees, and then clean up the floating ash and loose particles to enhance the adhesion If there are holes, pockmarks, cracks, etc on the brick wall, white cement putty must be used to make up and level the defects, and 107 glue talcum powder putty shall be applied after the moisture content is about 10% 2) Apply the putty for the first time at the gap between the board and the board surface, with a depression of 1-2mm After the putty is dry, polish it with sandpaper The type of sandpaper used for grinding shall be determined according to the accuracy requirements Use a clean towel to remove the surface dust 3) For the construction of the interior corner of the wall and the ceiling, firstly, paste paper tape on the wall and the ceiling, and expose the two outer sides of the wood interior corner decoration line for 20-30mm respectively, with the same technical treatment After the first batch of self-made or finished putty, the wood interior decoration line can be fixed Then, apply putty one or two times 4) 107 glue and talcum powder putty are used to avoid and reduce cracks and voids The proportion of putty prepared by ourselves is 107 glue: talcum powder = 1:2 (1:1 for full batch) It can also be applied to the matching products of manufacturers The mix proportion of putty can be adjusted properly according to the construction object and construction conditions (such as climate, etc.) In general dry weather, when mixing putty, a small amount of tap water can be added When the weather is wet or the temperature is low, no water can be added Besides, the glue should be dried and there should be no granules Sift the powder and mix well 5) The perforated paper tape with a width of 50 mm and elasticity of micropores (in the full length method, dacron cloth or bandage material is used, and the effect is not satisfactory) The back of the perforated paper tape is fully coated with 107 glue, and the surface of the board (seam) base course is coated with 107 glue 60-80 mm The perforated paper tape is pasted, and bubbles and excess glue are pressed out After the paper tape is dried, the whole board base course surface is fully coated with putty for two to three times As long as the material properties and operation methods of latex paint are correctly mastered, the crack phenomenon will not be difficult to overcome In this way, the defect of decoration effect can make up for the defect of coating home, which is focused on the news and coating of coating, diatom mud, paint coating, coating process, fire retardant coating, diatom mud, paint coating, coating process, decoration knowledge and decoration effect map of fire retardant coating,