Practice question · Numerical answer
Roughly how many parts of water per 100 parts of plaster does a typical pottery plaster use, by weight?
Hints
- Less water than plaster, by weight.
- Around seventy parts to a hundred.
Show the answer
70 (answers within ±8 count)
Why
Around 70 parts to 100. The exact ratio is a property of the specific plaster and is printed on the bag, which is where it should be read from, the number here is a working expectation rather than a specification, and different plasters vary substantially.
Practise Moulds II: Materials and Procedure
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