Putty layer brush shave point interpretation and wall problems say NO

After finishing the basic cleaning, brushing the interface agent, leveling, and crack prevention, the wall is then brushed. PuTTY has a great influence on the quality of the wall surface in the later period. If the construction is not proper or there is a problem with the putty itself, it will bring a series of wall problems. Next, let's take a closer look at the construction method of the scraping putty.

Putty is mainly composed of an organic pigment and an adhesive, which is used to fill in and fill up pits, air holes, pockmarks, and scratches on the surface of the base layer. The putty used in paint construction should have good plasticity. After drying, it should be firmly bonded, not peeled, cracked and powdered, and easy to be polished.

1. Prepare putty

If the common putty powder needs to be deployed on site, the proportion of putty powder and water should be strictly controlled according to the product description. At the same time as far as possible to stir it, and then let it stand for 10 to 20 minutes to stir evenly to use.

Putty preparation method:

First brewed cellulose solution. Cellulose is also called carboxymethylcellulose, light yellow or white floc. 0.2kg of cellulose was added to 10kg of water, which turned into a pale yellow transparent liquid after melting. Generally, it takes 1-2 days to dissolve.

Followed by a proportion of the cellulose aqueous solution and emulsion or 107 glue mixed evenly; Finally, add cement, large white powder or gypsum powder and other powder mixing; consistency for the paste, not too thin, in order to facilitate the use.

Problems to be noted when formulating putty:

(1) The mix ratio of putty can be adjusted according to specific construction objects and construction conditions (such as temperature and humidity). When the weather is dry and hot, you can add more water, and vice versa.

(2) Putty powder should be sieved and it should not be affected by moisture.

(3) Putty should be used quickly after being well-matched, generally should be used within 2-3 hours; gypsum putty solidification, final condensation no more than 30 minutes, to be used with the

2, scraping putty

Use a scraper or spatula to scrape as usual. When you scrape, try to force it evenly to make it adhere to the wall completely. Do not scrape it again in one step.

Batch scraping thickness: The thickness of the batch scraper is generally between 0.8 and 1.5 mm. If the batch is too thick, it will cause hollowing. If the batch is too thin, it will cause powder removal.

The number of scratches: The number of scratches can not be too much, the new house can be approved twice, and the second-hand housing is better. After each brushing, due to the high strength of the putty, the putty should be in the semi-dry state. When the light pressure is not deformed by hand, the light is leveled with a scraper.

3, sandpaper polishing

After the putty is to be dried, sandpaper is used for sanding. The sanding must be done from the periphery to the center. When grinding the corners, be careful and straighten. Pay attention to sanding the sandpaper so that it does not leak or grind the putty. After the squeegee has been sanded and polished by sandpaper, clean the dust and clean the paint directly.

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