Plaster of Paris - Alamo 69

Calcium sulphate hemihydrate, particularly indicated for the manufacture of ceramic casting moulds. Ideal for casting and roller moulds.

Mixing
The plaster/ water ratio indicated below is recommended. Less water increases strength, but less time is available for emptying. The plaster is poured into the water (never the other way around), is allowed to moisten and is mixed for approximately one minute, stirring it gently and evenly to prevent the formation of air bubbles. The recipients must be clean. Discard leftovers in a rubbish bin, NEVER down the drain.

Storage
In dry areas on wooden slats, with spaces between rows and with the wall to ensure free air circulation. The plaster can be stored in these conditions for months without losing its properties.

Analysis
Physical Specifications
Colour: White
Ph: 7
Mixing Rate: 145 – 155g plaster / 100g water
Water Factor: 65g water/ 100g plaster (water/ plaster ratio used to obtain results of analysis)
Start setting time: 9 – 11 minutes
Finish Setting Time: 29 – 33 minutes
Setting Expansion: 2.1 mm/m
Flexural Strength: 70 kg/cm²
Compressive Strength: 190 kg/cm²
Brinell Hardness: 320 kg/cm²