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Putty layer bubble, empty drum is how to cause, how should handle?

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[Abstract]:
Putty layer empty drum, bubbling, the main reason is the base and putty layer between the existence of gas, and why the air did not follow the normal diffusion to the surface layer and the internal diffusion to the base layer, but in the middle, the main reasons are as follows: There is a dense layer between the base layer and the putty layer, such as using glue, zengmu bao or wall occlusion without adding water for interface treatment, so that air cannot normally diffuse to the base layer.

Solution: if the wall bubble or empty drum is small, it can be processed by polishing and then interface treatment with wall occlusion, and then batch scraping; If the wall cavity drum is large, has caused a large area of fall off, it is recommended to remove all the wall occlusion treatment, and then batch scraping.
Putty layer empty drum, bubbling, the main reason is the base and putty layer between the existence of gas, and why the air did not follow the normal diffusion to the surface layer and the internal diffusion to the base layer, but in the middle, the main reasons are as follows: There is a dense layer between the base layer and the putty layer, such as using glue, zengmu bao or wall occlusion without adding water for interface treatment, so that air cannot normally diffuse to the base layer.
 
Solution: if the wall bubble or empty drum is small, it can be processed by polishing and then interface treatment with wall occlusion, and then batch scraping; If the wall cavity drum is large, has caused a large area of fall off, it is recommended to remove all the wall occlusion treatment, and then batch scraping.