Can I scrape putty when it's cold?

It's cold, so you can scrape putty. There are two kinds of putty: field modulation and finished putty. Glue and gypsum are used for putty prepared on site; You can also use color essence, white latex, white powder, etc. The drying time of putty is related to temperature, humidity and air circulation. Under normal circumstances, it can be done in about 4 days outside in winter, and it will take about a week if it rains. Generally, the first plastering primer needs to be dried slowly. In one week, it takes about 4 days to screen the wall for the second time and 2 days for the third time.

Putty scraping is one of the methods of interior wall decoration, which refers to an important step to remove the uneven part of the base surface and keep the wall smooth by filling or integral treatment. The specific method is to scrape putty on the wall to ensure the smoothness of the wall. Generally scrape it three times, dry it and polish it with sandpaper. This step is carried out before applying latex paint. Putty is made of a small amount of paint base, a large amount of fillers and a proper amount of colored pigments, mainly iron red, carbon black, chrome yellow and so on.

First, the basic steps of scraping putty

1, shovel wall skin: a slight wetting experiment can be done to test whether the adhesion of the original coating is qualified. Most of the walls are tested in one word: shovel! 2. Seal the wall once with 80 1 glue: the purpose of this method is to strengthen the adhesion between putty and wall. If you encounter an old house, you can brush the interface agent to increase the insurance factor.

3. Double-sided elastic line processing in the internal corner: Double-sided elastic line processing in the internal corner (pay attention to verticality), and the external corner processing can be done with a lever. Gypsum putty is prepared with gypsum powder and 80 1 glue, all of which are aligned. In general, gypsum line is not recommended.

4. Wall leveling: First, check whether the wall is "empty" (you can tap and listen to the sound), then check the concave part of the top and wall with a slightly longer aluminum alloy ruler, mark it, and level it with gypsum putty.

5. Formal putty scraping: After gypsum putty is dried thoroughly, putty scraping (it must be dried thoroughly every time). There are two ways to test whether the putty is dry: one is to observe whether the color is consistent; Then see if there is a phenomenon of "sticking sandpaper" when polishing. Strong light oblique grinding, the top surface can be used 360 sandpaper.

Second, the matters needing attention of blowing putty

When the base has strong absorbability, it should be sealed with primer before scraping putty, so as to avoid the glue in putty being absorbed too much by the base and affecting the adhesion of putty. Grasp the inclination of the tool when scraping and coating, and apply force evenly to ensure that the putty is full.

In order to avoid excessive shrinkage, cracking and falling off of putty, scrape it not too thick at a time. According to the characteristics of different putty, the thickness should be 0.5 ~ 1 mm, and don't scrape too much to avoid peeling, falling off or squeezing out the rubber compound in the putty, and the sealing surface is not easy to dry.

According to the performance of the coating and the situation of the base, choose the appropriate putty and scraping tools. When filling holes and cracks in the base with putty knife, press the blade with index finger and press putty into the defect. Fill it up, fill it up, scrape the putty around, and try to reduce the traces of putty.