Trimming Plaster for Model

1. Make a base clay for model

2. Using fiber make a boundaries and tied

3. Pour plaster slip

4. Ready for trimmming (cheese hard)

5. Trimming

6. Completly model

Usually model for casting is made of clay. The forming technique could be throwing, pinching, or coiling. As alternative, you can use ready made product like artificial bird, mug, or plastic glass. For long usage you can use plaster, meanwhile the clay model will damage for once used. Also the plaster model is useful in consistency of size if make for next molds. 

The standard procedure making model is using special equipment. But actually you can use kick wheel. The important is a right moment for trimming and kind of tools. The tools also do not need special ones, we can use simple tools like iron cutter, iron scraper or iron ruler. Trimming for plaster and clay is really different. You need more effort to trim plaster.   

To shape the plaster model you must have some tricks for satisfied result. The plaster don't let hard, but must in cheese hard to begin trimming. It must be in hurry because the plaster will be hard by time to time so that it will be more difficult for trimming.