A method of producing a gypsum plaster board. This method includes a step of preparing a starch paste which is effective to bond the gypsum core member and both paper boards. In this step, first, about 10-30 wt % of starch such as corn starch based on water is added to water and mixed to obtain milk...http://www.google.es/patents/US4392896?utm_source=gb-gplus-sharePatente US4392896 - Method of producing a gypsum plaster board
