Magnestum oxysulide freproof insulation boerd commonly known as hllow megnesum oxsufde board)is a specdlal core material for colorstee purihcation board. It s made ofmagnestum sulfate,magnesum oxide and other materials by lamination method, efter pressing andnouding. tis a new bype of dean and heat presenation product wth gren andnvrormenta rotection Compared wihother ypes of colorstel late core materials,t hes the adentages of fre prevention, waterprcoo , themelinulartion, bending resistance, heatnsulation,soundinsulation, non-toxlcty light weight and neat epearence. t makes up for the shortcoings of some colr stel purifhcation plate core materlon the market atresent, such as stergth, bending resictance, bearing capacity, Excllertstablty especily suitatle for some ndor andoutdoor partition wll and colng for specitc geogrephicacharacteristics.