Plaster Of Paris

Fine texture of Plaster of Paris allows it to capture intricate details and produce highly accurate molds. Properties like strength, cost, or opacity do not contribute to its suitability for molding.

Retarders slow down the setting time of Plaster of Paris, providing more time for mold-making. They are not for color changes or transparency.

The standard water-to-plaster ratio is 2:3, ensuring the right consistency for strong and workable molds. Other ratios result in weak or unworkable mixtures.

Grog adds strength, while quicklime accelerates setting.
Salt, sugar, and hot water are ineffective for the rapid solidification of plaster of Paris (P.O.P).

The setting of Plaster of Paris involves hydration. When mixed with water, it forms calcium sulfate dihydrate, resulting in its hardening. Oxidation and combustion are incorrect reactions.