Crocodile paint small class . . . Stay away from putty foaming and look here.

As the basic material of wall decoration, putty is mainly used to find flat walls, which in turn makes the paint show a more beautiful decorative effect. However, in the process of putty construction, if the details are not handled properly, the phenomenon of putty layer foaming will occur, and affect the subsequent construction.
Under normal circumstances, during the putty scraping process, the air will spread to the surface layer or to the grass-roots internal diffusion, and if the construction, the air does not spread out normally, resulting in the presence of gas between the grass-roots and putty layer, will form bubbles .
Factors affecting the normal diffusion of air
(1) grass-roots is too dense, such as poured concrete grass, because the grass is too dense, less internal pores, resulting in putty scraping process, air can not spread to the grass-roots internal, so that the grass-roots and putty layer between the air can not be discharged in time to form bubbles.
(2) the grass is too dry, resulting in putty scraping, putty moisture is quickly absorbed by the grass, and the grasshoe is filled with moisture, a large number of air replacement out, so that the grass and putty layer of air and the formation of bubbles, especially in the summer high temperature weather, the grass is too dry, very easy to bubble problems.
(3) putty stirring, the water is too high, resulting in putty stirring too thin, so that putty batch scraping, putty filled the grass pores, replaced air is not easy to squeeze the inside of the grass to spread, and easily spread to the surface layer, and the formation of bubbles.
(4) putty single batch scraped too thick, resulting in putty batch scraping, the internal air is not easy to discharge in time to form bubbles.
treatment method
(1) to the too dense grass, you can first use wall mud for rough flat, and then scrape putty.
(2) for the grass-roots too dry situation, can be scraped before the putty batch, the grass-roots first sprinkler moist, or rolling wall to the grass-roots closed reinforcement treatment.
(3) putty stirring, stir into a suitable viscosity, shelved for 10 minutes after the batch scraping can be, construction without special requirements as far as possible not to stir too thin.
(4) putty scraping should pay attention to the principle of thin batch multiple times, putty single batch scraping thickness control within 0.5mm-1.5mm.
by understanding the reasons for putty foaming, help us to grasp the putty scraping appropriate grass-roots conditions, environmental conditions and construction technology, so as to avoid foaming problems. If the putty batch scraping, due to the above situation caused by putty foaming phenomenon, you can also putty completely dry before (watermark completely eliminated) before the knife back, the bubble pressure treatment.
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