... reducer, the setting time and the thickness of the gypsum paste can be controlled as you want. This product ... will be prolonged. But as the difference of the gypsum type, the setting retarding effect may different, so before ... the plaster gypsum, the glue gypsum, the gypsum putty, the prefabricated gypsum components, the gypsum stuffing materials, the gypsum model broad, the gypsum decoration coating ...