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INSTRUCTIONS

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  HOME   Gypsum Stones & Plasters   Instructions
Gypsums
Model stone / Die Stone / Orthodontic Stone / Orthodontic Plaster / Model Plaster
All Gypsums meet the specifications of the American Dental Association

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INSTRUCTIONS

Choose water to powder ratio from table below for the product you purchased. Measure room temperature water (distilled water is always the best to use) into mixing bowl in the correct proportions as shown in the chart below. Always add powder to liquid.

Mix by spatulating with a stiff-bladed, round-end spatula for 60 seconds at a rate of 120 revolutions per minute until a smooth and uniform mix is achieved.

When mixing mechanically, use slightly more water and mix 15 to 30 seconds at 450 rpm. Mechanical mixing is highly recommended for die stone models for crown and bridge work. It provides much stronger and unifrom models.

Some color streaking is normal. The color will rapidly become uniform under active spatulation.

After pouring, be sure to thoroughly clean the mixing bowl. Any dried-out particles of gypsum may cause undue acceleration of future mixes. Refer to chart for information on physical properties of each gypsum product.

Use colder water to increase working and setting time.

To decrease setting time to make the stone set faster, use warmer water.

Storage and Handling: Store in a cool and dry place. High temperature and humidity affect the gypsum materials adversely.

Products

Water/Powder Ratio

Initial Set, Minutes

Setting Expansion,%

Dry Strength, psi

Superstone Die Stone, Type IV

23 -25 / 100

8 - 12

0.095

13,500

Superstone Die Stone, Type V

23 -25 / 100

8 - 12

0.200 max

13,500

 

  
 
 

 

Lab Model Stone

30 -32 / 100

8 - 12

0.15

6,000

Lab Model Stone - Hard

26 -27 / 100

8 - 12

0.15

10,000

 

 
  
 

 

Orthodontic Die Stone

23 -25 / 100

8 - 12

0.095

13,500

Orthodontic Model Stone

30 -32 / 100

8 - 12

0.15

6,000

Orthodontic Model Stone - Hard

26 -28 / 100

8 - 12

0.12

8,000

 

 
 
 

 

Orthodontic Plaster

45 - 47 / 100

6 - 8

0.20

3,500

Lab Plaster - Fast Set

45 - 47 / 100

4 - 6

0.20

3,500

Lab Plaster - Regular Set

45 - 47 / 100

6 - 8

0.20

3,500

Lab Plaster - Slow Set

45 - 47 / 100

10 - 12

0.20

3,500

 

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