Pour your plaster into an measurement device. However not the one as its measured in pounds and not grams or milters needed to have an successful cast. You'll need digital scaling measurements to be perfect on your mixing because if you don't it'll be moist and damp to the touch. It needs to be solid.
For a perfection mixture.
2L water for 2740g plaster
1L water for 1370g plaster
500ml water for 685g plaster
250ml water for 345g plaster
After that task pour the plaster mix into a bucket and begin siring the solid parts apart with your fingers. If you have Eczema, suggest you'll wear plastic gloves for this task for an thick gooey subscene. If done incorrectly it end up liquid like. If so your cast will work but not fully as it'll tend to be cold under hand and fragile.
Once finished pour it in your form wheatear it be vacuumed formed or a gelflex mould it'll work. This form in front of you will only at best have five casts in it, before it breaks apart due to the weak structure caused from clawing it out and patched up surface deforming the cast as a whole. Gelflex on the other hand is made of cutable rubber of which can cast things that are solid objects and not plastic since in the molding process would melt the object. You'll be able to make great amounts with only the form changing in detail over time in small areas but still have the mold solid.
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