What are the steps for scraping putty on gypsum board? What material is putty powder?

When applying putty, you don't need to apply it on the same place multiple times to prevent the skin from curling and glue from falling off. This will easily cause the putty on the wall surface to be difficult to dry, thus affecting the overall aesthetic effect. How to mix the putty powder for wall scraping? What kind of material is putty powder? What are the methods of scraping putty? The following is the sharing of putty powder brought to you by Encyclopedia Knowledge Network.

Contents of this article

1. What material is putty powder?

2. What are the methods for scraping putty?

3. What are the steps for scraping putty on gypsum board?

4. How to prepare the putty powder for wall scraping

What material is putty powder

Putty powder is a kind of building decoration material, the main ingredients are talcum powder and glue. The white layer on the surface of the rough house just purchased is putty. Usually the whiteness of putty is above 90 and the fineness is above 330. The filler mainly plays a filling role. Commonly used ones are calcium carbonate, talcum powder and quartz sand. Pay attention to the matching of filler fineness. Putty is divided into oily putty and water-based putty, which are used for paint and latex paint construction respectively. The putty we usually refer to is "water-based putty".

What are the methods of scraping putty?

1. We process the wall surface. The base layer has the same requirements as the white lime hemp knife surface layer. The wall top plate, board seams, etc. will be cleaned of floating dust, and residual debris and protruding parts will be removed. The concave holes will be leveled with mortar, the door and window openings and lintel gaps will be sealed, and the corners will be leveled and smoothed with 1:3 cement mortar. The surface of the base ash will be leveled with a wooden mortar.

2. Understand the concrete and mortar wall surface. Construction can be carried out directly when it is 70% dry. If it is slightly dry, it should be moistened with water. If the concrete wall is seriously oily, use 10% alkaline water or washing powder to clean it, and then wash it with clean water. General oil stains can be polished with sandpaper.

3. For walls that absorb water quickly, it is best to spray them with a 1:2 or 1:3 107 glue solution to prevent the gypsum powder from losing water too quickly and becoming powdery. The paper-faced gypsum board wall should be wiped with a wet cloth first, then the surface should be leveled and pressed. The total thickness of the two coats should not exceed 2mm. The internal and external corners should be scraped twice with a steel plate or rubber scraper, with a thickness of 0.5~1mm.

What are the steps for scraping putty on gypsum board

1. Check the wall to see if it is solid and flat. If there are cracks or stains on the wall, you need to treat the wall first.

2. Prepare the materials. Prepare the materials, then evenly roll the concrete interface paint on one side and wait for it to dry.

3. Scrape putty. Determine how many times to scrape putty according to the flatness of the wall.

4. Polish the putty. This step should be done after the putty is completely dry. It is best to do it at night. Use a 200-watt or higher light bulb close to the wall and check the flatness while polishing.

5. Apply primer. After sanding the putty, start applying primer. First, clean the dust left by the sanding putty on the wall, apply the primer evenly, and wait for the primer to dry.

6. Apply topcoat. The last step of putting putty on gypsum board is to apply topcoat. Generally, topcoat needs to be applied twice. The first coat can be applied after it dries, which only takes 2-4 hours, and the second coat needs 1-2 days later.

How to prepare putty powder for wall scraping

1. If it is cement putty, you need to mix cement putty, glue and water in a ratio of 5:1:1. After stirring evenly, wait for about ten minutes and stir again before applying it to the wall.

2. If it is white putty, you need to mix white powder, talcum powder and emulsion in the ratio of 10:10:1, and add appropriate amount of cellulose aqueous solution.

3. During the painting process, you need to ensure the angle of the tool used and keep the force even, so that the scraped putty is fuller. At the same time, when scraping the putty, you need to clean the putty around to reduce the marks.