What is the reason for foaming after using ash calcium powder, heavy calcium powder and cellulose to produce putty powder?

Lime lime powder, heavy calcium powder (or gypsum powder), and cellulose are the main ingredients in putty powder.

Our core product, HPMC powder, industrial grade chemical HPMC can provide you with higher quality products, and can also be customized to different viscosities according to your needs. Shijiazhuang Qingquan Cellulose Co., Ltd.is a cellulose manufacturer from China.

Lime lime powder improves the product's performance, including its strength, hardness, water resistance, and its ability to scrape and sand during application. Heavy calcium powder acts as a filler to reduce production costs, while cellulose provides moisture retention and bonding.

The main possible causes of putty powder bubbling are as follows:

1. The base layer is too rough and has tiny pores. When applying the putty, the putty compresses the air trapped in the pores, and the air pressure then rebounds, forming bubbles.

2. A single coat is applied too thickly, preventing the air trapped in the putty pores from being squeezed out.

3. The base layer is too dry and has a high water absorption rate, which can easily lead to numerous bubbles in the top layer of putty.

4. Airtight substrates such as water-resistant paint and high-grade concrete are impermeable and can cause bubbling.

5. Putty is prone to bubbles during high-temperature construction.

6. The base material has too low water absorption, resulting in a relatively long water retention time during the application of the putty. This causes the putty to remain in a slurry state on the wall for a long time without drying, making it difficult for the trowel to squeeze out the bubbles, resulting in pinhole-like pores. This is why there are more bubbles on the top of the formwork than on the wall when applying the putty. The wall absorbs a lot of water, while the top of the formwork absorbs very little.

7. The cellulose viscosity is too high.