The water used must be clean, free of oils and solvents to ensure a perfect setting. • the excess water in the mixture causes a slow setting and least resistance of the finished product. • A stucco of quality has a mix of one to one. • plaster setting requires a certain amount of water, which is why it is important to respect the proportions of the mixture is recommended. • COBOCE plaster has a fast setting, which requires a greater speed of application, which allows better performance in the labour force.
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To mouldings, it is recommended that water/plaster relationship is something less than one, i.e., that the amount of added water does not exceed the amount of gypsum in volume in the mix.
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