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Plaster and Gypsum Cement Products, Properties, and Mixing Instructions.

PRODUCTS
COMMON USES
CONSISTENCY
SETTING TIME
COMPRESSION
Industrial Plasters
Duramold
Ceramics
68
27-37 
2,900
Puritan Pottery
Ceramics
66
27-37 
2,400
No. 1 Casting Plaster
3-D Casting, Statuary
65
27-37
2,400
No. 1 Pottery
Ceramics
70
27-37 
2,000
Moulding Plaster
3-D Casting, Statuary
70
27-37
2,000
White Art Plaster
3-D Casting, Statuary
70
27-37
2,000
Pottery Plaster
Ceramics
70
14-24
1,800
Gypsum Cements
Hydro-Stone
3-D Casting, Road Repair
32
17-20 
10,000
Statuary Hydrocal
Statuary
40
25-35 
6,500
Ceramical
Ceramics, Statuary
40
18-23
6,500
Ultracal 30
Ceramics, Tooling
38
25-35 
6,000
Hydrocal White
Ceramics
45
25-35 
5,000
NOTE: Calculating the amount of necessary material and water on the basis of volume is tricky.  Hydrocal White will yield about 50% more volume than the water after the addition of the material.  I like to mix more than I will need, and typically will have an extra mould available (such as a plaster batt or plastic storage container) for the excess.

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