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Plaster
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01.
Production and reproduction of gypsum models (Industrial Plaster)
02.
Steel casting practice
03.
Alternative to wooden, steel or plastic castings
04.
Other gypsum models requiring high strength, solidity or precision
05.
Gypsum cases for gypsum model production (Industrial Plaster)
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Type |
Water consistency( % ) |
Setting time(min.) |
Expansion Ratio( % )
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Tensile strength
(㎏f/㎠) |
Compressive strength
(㎏f/㎠)
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Property |
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Initial |
Final |
wet |
dry |
wet |
dry |
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DIASTONE MR-150 |
26 |
18 |
50 |
0.05 |
35 |
65 |
350 |
700 |
Blending resin
Highest compression
Good surface
Hardness |
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DIASTONE MR-100 |
30 |
15 |
50 |
0.05 |
25 |
50 |
250 |
500 |
Blending resin
High compression
High hardness |
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DIASTONE MR-50 |
30 |
12 |
45 |
0.05 |
25 |
50 |
250 |
500 |
Blending resin
High compression
High hardness |
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DIASTONE MR-5L |
35 |
20 |
55 |
0.05 |
20 |
38 |
200 |
310 |
Blending resin
High compression
Low expansion |
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DIASTONE MS-L |
42 |
25 |
50 |
0.01 |
15 |
40 |
200 |
300 |
Extremely lowest
expansionv |
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DIASTONE M-10 |
35 |
23 |
45 |
0.03 |
25 |
45 |
220 |
350 |
Lowest expansion
retardation of
coagulation |
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DIASTONE M-20 |
50 |
15 |
40 |
0.10 |
18 |
35 |
160 |
280 |
Easy process
Good workability |
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DIASTONE M-30 |
45 |
15 |
30 |
0.03 |
20 |
38 |
180 |
300 |
Low expansion |
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DIASTONE M-40 |
50 |
15 |
40 |
0.15 |
18 |
35 |
180 |
300 |
Abrasion resisting |
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01.
Amount of Water to Be Mixed
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Accurate measurement of the amount of water and gypsum to be mixed is one of the most important conditions for the resultant quality. Please follow the standard mixing volume that is appropriate to each type of gypsum.
According to the increase or decrease in the amount of water to be mixed, there is a corresponding change in the time for stirring or hardening and in the gypsum model's strength and solidity, etc.
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02.
Mold Release Agent
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In case a hygroscopic model is used, there might be some difficulties in producing a model.
Please thoroughly apply Sam Woo Surface Reinforcing Agent (표면강화제) to the surface of the model and impregnate the mold lubricant with it. If the model is made of steel, Vaseline or stearic acid gerotin liquid (스테아린산 게로친 용액) should be used instead.
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03.
Stirring Time
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If casting is done by molding, please mix accurately measured amounts of water and gypsum and stir the mixture thoroughly to get an even consistency before putting it into the model. In addition, if casting is done by laying, let the mixture stand for a while and use it when the viscosity of the Slurry goes up.
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04.
Stripping
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When producing a 凸-type model from a 凹-type model, the casting-out should be done when the calorific temperature is highest. When producing a 凹-type model from a 凸-type model, the casting-out should be done about two to three hours after the highest calorific temperature is reached.
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