The hardness of plaster mold silicone rubber refers to the amount of pressure required to form indentations on the silicone rubber. The higher the hardness, the greater the pressure needed. Plaster mold silicone can be used for a variety of applications, including medical devices, food-grade products, and cosmetics.

No, there are not different types of plaster of Paris. However, there are different types of plaster. There is plaster of Paris, pottery plaster, Puritan pottery plaster, Cerami-Cal, and Hydrostone.

Gypsum plaster (plaster of Paris) ( CaSO4·½H2O )

A large gypsum deposit at Montmartre in Paris led gypsum plaster to be commonly known as "plaster of Paris"

plaster.

Yes, plaster is a noun, a common noun. Plaster is also a verb (plaster, plasters, plastering, plastered). Example uses:

Noun: The plaster in the hall is cracked.

Verb: We'll have to call someone to plaster those cracks.