Pardisun gypsum company private fquity (limit) was registered in 2004 in Semnan companies registration office with national number 3372 then has started its activities since 2004 in Momen Abad of Semnan in 24th km, that rich and high quality of gypsum mines is uniqe in Iran, middle east and Asia started by 1000 ton capacity of machine gypsum production that have had high quality and have distributed in Iran and neighboring countries and middle Asia. One of important reason in company success considering similar companies difficulties, is managers and shareholders background that have had activity and experience more than half a century, the most important thing is exact and detailed in formation aboot special situation in industry and market that high quality products result of managers foresight and effatcts. According to invivonm ental pollution of machine gypsum production, this company proceed design and construct 2filter back devices in 2006 that adapted to invironment and naturad sources with personal expenses and professionals. Pardisun gypsum company one the best sanvple unit, of natural resources and environmental departmentin province. Pardisun gypsum company has construct two (2) phases by research and effort of experienced local industrialists according to market needs and creat added value in this industry and improvement, in 2013 that the first phase has been seperators to micronized gypsum production with different meshes and settings and also mix micronized to speual use in 2015 and second phase is mixing plant to produce polymeric plaster and plaster whit additives that will be operated in 2017.