What About Water

You may have noticed that none of the above formulas include measurements for water. It's impossible to know the exact amount of water required because of all the variables. The water content of the sand, the temperature and humidity, and the type of ingredients will all affect the amount of water required for a suitable mix.What we can say accurately is this: too much water will ruin your plaster. As any good bread maker will tell you, once you've overwatered a mix, it is very difficult to recover by adding more dry ingredients. So slowly increase the amount of water, and eventually you will get a feel for how much to add.

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