USG HYDROCAL 105 PLASTER

Hydrocal 105 Plaster: This yellow dental stone is very similar to Hydrocal White, but tinted for dental work.

Packaged in standard 50-pound bags

Mix Ratio: 40-50:100
Expansion: 0.42%
Crush PSI: 6000
Set Time: 20-30 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 USG12:
• Mix should be 10 quarts water to 50 pounds USG6 or USG12..
• Dump plaster in water.
• Allow to soak for 2 minutes.
• Mix 2 minutes to heavy creme density.