How to use the non crack gypsum powder after solidification is also a skill. The solidification time is mainly related to the amount of water added (additional explanation of additives), followed by the mixing time, casting container, temperature and humidity. The mixing ratio of water and gypsum powder: the more water, the longer the setting time of gypsum, the lower the density and fastness of gypsum; the less water, the shorter the setting time, the higher the density, the higher the fastness, according to the use requirements control. Then talk about the mixing time. Generally speaking, when the gypsum powder is stirred to be very uniform, it can be poured, * controlled within 5 minutes. The longer the mixing time is, the faster the setting time of gypsum powder is.

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