March 2026: We are doing major upgrades to code here, please be patient regarding any issues. If any page is not working for a period of hours, please contact us. Thank you.
| Monthly Tech-Tip | Feb 14-15, 2026 - Major Server Upgrade Done | No tracking! No ads! |
The slurry contained insufficient Davan deflocculant. During casting it gelled excessively in the mold. Even shaking the piece while pouring out the slip was not enough to loosen it up and get a good drain. If slurry rheology is not right the quality of ware produced is affected like this.
| Troubles |
Casting Slip Problems
Casting slips are deflocculated in order to reduce water content. It is important to understand this phenomenon and know how to assess a slurry to know what it needs. |
| Glossary |
Slip Casting
A method of forming ceramics. A deflocculated (low water content) slurry is poured into absorbent plaster molds. As it sits in the mold, usually 10+ minutes, a layer builds against the mold walls. When thick enough the mold is drained. |
Buy me a coffee and we can talk