Casting Plaster: Great for casting plaques and figurines. This general use industrial plaster is formulated for greater strength and chip resistance than regular plaster. Working properties and set time similar to Hydrocal White.
Packaged in standard 50-pound bags
Mix Ratio: 70:100
Expansion: 0.20%
Crush PSI: 1700-2500
Set Time: 14-24 min
General Mixing instructions –
Your mixing container and equipment should be clean and free of all previous plaster mixing debris. Old plaster will cause your new mix to set irregularly and at a faster rate.
Water needs to be carefully and specifically measured. Water temperature is very important to your set time. Testing water is at 70°F – use a thermometer! Hotter water will speed up your set time, cooler water will slow and retard the set time.
Plaster mixes into water: sift your plaster into the pre-measured water, allow to slake for 30 seconds and mix time will be about 30 – 60 seconds. Plaster ages, it is hydroscopic. Older plaster may require less water.
For USG3:
• Mix should be 1 part water to 1½ parts plaster (or 35 lbs water to 50 lbs plaster)
• Slowly add plaster in water.
• Allow to soak for 2 minutes.
• Mix 2 minutes to heavy creme density.
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