Step 1: Materials neeeded
Pottery plaster. It HAS to be ceramic grade, otherwise it will dissolve in water very easily. (please wear a NIOSH mask when working with dry plaster. Avoidance of lung cancer is so very worth it...),
A non-important bucket,
The objects you want to make the mold from (must be flexible plastic, unless you want to cut it up to get your mold out),
A spray bottle of vinegar (not pictured),
Something to stir your plaster with.