2007-05-30 20:20:21 · 4 answers · asked by eve8theapple 1 in Health ➔ Other - Health
Plaster is made from the mineral gypsum, which is called Calcium Sulphate by chemists (Gypsum in the ground is calcium sulphate dihydrate, after calcining, it becomes calcium sulphate hemihydrate, also known as hydrous calcium sulphate.) It is often called plaster of Paris, because of the large deposits of pure gypsum underlying the French capitol, which were utilized early on by local artisans.
Plaster of Paris, or simply plaster, is a type of building material based on calcium sulfate hemihydrate (gypsum.)
A large gypsum deposit at Montmartre in Paris is the source of the name.
2007-05-30 20:36:51 · answer #1 · answered by rosieC 7 · 0⤊ 0⤋
Casts used to be formed from plaster of paris, it's only been in the last15-20 years that the switch over to fiberglass casts started. Even with a fiberglass cast, it is still plaster underneath the fiberglass "tape".
2007-05-31 03:25:41 · answer #2 · answered by aett24 2 · 0⤊ 0⤋
The first place they used that mixture for plaster was near Paris.
2007-05-31 03:23:35 · answer #3 · answered by Kuji 7 · 0⤊ 0⤋
A large gypsum deposit at Montmartre in Paris is the source of the name.
2007-05-31 03:23:22 · answer #4 · answered by ZERO 4 · 0⤊ 0⤋