j e motzkin on tue 28 dec 04
Water to plaster ratio table
waterplaster ozor grams1/2 pint11oz3121pint1lb 6 oz6241qt2 lb 12oz12481 1/2 qt4lb2oz19722 qts5lb8oz24972 1/2 qts6lb14oz30213 qts8lb4oz37443.5 qts9lb10oz43881 gallon11 lb4992
This table is water volume to plaster wieghts. Use 70F water.
Gives a plaster consistency of 73. (good for usg no1 pottery plaster for slip casting molds)
I have found that weighing the plaster a few times has informed my use of the "islands" technique that I used for years. It always seems like too much plaster to possibly add to the appropriate volume of water. Too little plaster will give you a weak result.
judy
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j e motzkin on wed 29 dec 04
Sorry, the spread sheet format did not translate into email. hope this is readable. jm
Water to plaster ratio table
water plaster oz (or grams)
.5 pint to 11oz or (312gr)
1pint to 1lb 6 oz (624)
1qt to 2 lb 12oz (1248)
1.5 qt to 4lb2oz (1972)
2 qts to 5lb8oz (2497)
2.5qts to 6lb14oz (3021)
3 qts8lb4oz (3744)
3.5 qts to 9lb10oz (4388)
1 gallon11 lb (4992)
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