Common knowledge of coating: Causes and treatment of foaming of putty powder

Core tip: the main reason for the hollowing and blistering of putty layer is the gas between the base layer and putty layer The main reasons why the air does not diffuse to the surface layer and to the inside of the base layer according to the normal, but appears in the middle are as follows 1、 Causes of foaming of putty powder 1 The base course is too rough with small holes When applying putty, the air in the hole will be compressed, and then the air pressure will rebound to form bubbles 2 The air in the pores of putty is not squeezed out due to too thick single pass of scraping 3 The base course is too dry, absorbing 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: putty layer hollowing, blistering, mainly due to the presence of gas between the base and putty layer The main reasons why the air does not spread to the surface layer and the base layer are as follows 1、 The reasons for the foaming of putty powder 1 The base course is too rough, with small holes When applying putty, the air in the hole will be compressed, and then the air pressure will rebound to form bubbles 2 The air in the pores of putty is not squeezed out due to too thick single pass of scraping 3 The base course is too dry, the water absorption is too high, which is easy to cause more bubbles in the putty on the surface layer 4 Water resistant coating, high-grade concrete and other base surfaces with good airtightness cause blistering 5 During high temperature construction, putty is easy to generate bubbles 6 Substrate water absorption is too low It causes the putty to be in slurry state on the wall for a long time without drying due to the long time of relative water retention when applying putty, so that the bubbles are not easy to be squeezed out by the mud knife! The pinhole pore is the reason why the top of the formwork is scraped more than the bubbles on the wall The water absorption of the wall is large, and the water absorption of the top of the formwork is very low! 7 Too much cellulose! The home of coatings focuses on the news and information of coatings, diatom mud, paint coatings, coating process, fire retardant coatings, coatings, diatom mud, paint coatings, coating process, decoration knowledge and decoration effect map of fire retardant coatings,