Forms of Gypsum

Name/Chemical Formula Raw Gypsum
CaSO4 ・2H2
Chemical Reaction
Dehydration Reaction

Hydration Reaction
Name/Chemical Formula Calcined Plaster / Hard Plaster
αCaSO4・1/2H2
βCaSO4・1/2H2
Calcined Plaster / Hard Plaster
αCaSO4・1/2H2
βCaSO4・1/2H2
Chemical Reaction
Dehydration Reaction

Hydration Reaction
Name/Chemical Formula Drying Plaster
ⅢCaSO4
Drying Plaster
ⅢCaSO4
Chemical Reaction
Dehydration Reaction
HydrationCaSO4・2H2
Name/Chemical Formula ⅡCaSO4 ⅡCaSO4
Chemical Reaction
Dehydration Reaction

Hydration Reaction
Name/Chemical Formula ⅠCaSO4 ⅠCaSO4