NPFC - MIL-G-20098
|Publication Date:||31 January 1969|
This specification covers calcined gypsum (calcium sulfate hemihydrate).
The calcined gypsum shall be of the following types, as specified:
Type I - Fast setting Type II - Slow setting
Calcined gypsum is used in the manufacture and assembly of level vials for fire control equipment, also as an ingredient in fillers used in inert ammunition.