Paint knowledge | common problems in use of emulsion paint

Core tips: the common quality defects of emulsion paint coating are blistering, anti alkali powder dropping, sagging, bottom penetration, uneven coating, etc (l) Blistering: the main reasons are improper treatment of the base course, too thick coating, especially blistering when the large core plate is used as the base course In addition to mixing the coating evenly before use and mastering the consistency of the paint liquid, 107 glue can be brushed on the bottom putty layer once before brushing During rework and repair, the blistering and peeling place shall be cleaned, and 107 glue shall be applied before repair (2) Anti alkali powder removal: the main reason is that the base course is wet without drying, and the main reason is that the primer is not brushed and the paint is too thin If found 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: the common quality defects of latex paint coating are blistering, anti alkali powder falling, sagging, bottoming and uneven coating (l) Blistering: the main reasons are improper treatment of the base course, too thick coating, especially blistering when the large core plate is used as the base course In addition to mixing the coating evenly before use and mastering the consistency of the paint liquid, 107 glue can be brushed on the bottom putty layer once before brushing During rework and repair, the blistering and peeling place shall be cleaned, and 107 glue shall be applied before repair (2) Anti alkali powder removal: the main reason is that the base course is wet without drying, and the main reason is that the primer is not brushed and the paint is too thin If the anti alkali powder is found, it shall be reworked and repainted, the painted materials shall be removed, and the construction shall be carried out after the base course is completely dry In the construction, the sealing primer must be brushed once first, especially for the new wall, the consistency of the top coat should be appropriate, and the white wall should be slightly thicker (3) Sagging: the main reason is that the viscosity of the coating is too low and the coating is too thick During the construction, the consistency of the coating must be adjusted, and too much water shall not be added During the operation, the pen must be dipped frequently, less, and more smoothly to avoid sagging and flowing In case of sagging, the paint film shall be polished with fine sandpaper after drying, and the finishing coat shall be painted again after the finishing is cleaned (4) Bottom penetration: mainly because the coating is too thin, the number of times is not enough or the material quality is poor The products with high solid content and strong covering power shall be selected in the construction In case of bottoming, the number of times of painting the top coat shall be increased to meet the painting standard of the wall (5) Coating is not smooth: the main reason is that there are impurities in the paint liquid, the paint liquid is too thick, and the quality of emulsion paint is poor The brand with good levelness shall be used in the construction, and the paint liquid shall be filtered before the final painting The paint liquid shall not be too thick If the coating is not smooth, it can be polished with fine sandpaper and then painted with the top coat again (6) Cracks: the construction temperature is too low to reach the film-forming temperature of the emulsion paint, so the continuous film cannot be formed; improper treatment of the base course: such as the film cracking caused by the wall cracking; the first coating is too thick and not completely dry, i.e the second coating is applied, which causes the film cracking due to the different drying speed inside and outside Cracking of the cement putty to be scraped causes cracking of the coating （7） Falling off: the main reason is that the construction temperature of the emulsion paint is low, and the continuous film fails to form and cracks, which will fall off in case of water; the base layer is loose, and there are oil stains and other dirt, and the film adhesion with the base layer is not good, resulting in peeling off; the base layer has low putty strength, and the putty layer is painted with emulsion paint before it is dry; the base layer is too smooth, resulting in poor adhesion of the film Exfoliation: prevention: observe before construction, if there is leakage, ask relevant departments to solve it in time, and add special treatment It is recommended to use durable and waterproof elastic batch to dare to pre treat the wall surface, and then paint according to the routine The wall must be cleaned during construction (8) Discoloration and fading: some walls have too high temperature, long sunshine time, or water-soluble salt crystallizes on the wall surface, which causes discoloration and fading of emulsion paint; some walls contain too high alkali value, which infringes the weak alkali resistant pigment or resin and causes discoloration and fading; Do not use both emulsion reading and polyurethane paint at the same time You can apply emulsion paint two days after the paint is applied, or after the emulsion paint is completely dry (7 days at 25 ℃) 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,