Kev siv cov hmoov gypsum kuj yog kev txawj ntse, tshwj xeeb tshaj yog kev tswj xyuas lub sijhawm teem sijhawm ntawm cov hmoov gypsum: lub sijhawm teeb tsa feem ntau cuam tshuam nrog cov dej ntxiv (cov tshuaj ntxiv tau teev tseg cais), ua raws li lub sijhawm nplawm, ntim ntim, kub. thiab av noo. Ua ntej tshaj plaws, qhov sib xyaw ua ke ntawm dej thiab gypsum hmoov. Cov dej ntau dua, qhov ntev ntawm gypsum teeb lub sij hawm, qhov gypsum ceev thiab qis dua qhov ceev. Qhov dej tsawg dua, lub sijhawm teem sijhawm luv dua, qhov ceev dua thiab qhov ceev dua. Tom qab ntawd tham txog lub sijhawm nplawm. Feem ntau hais lus, gypsum hmoov tuaj yeem nrum tom qab nplawm kom txog thaum nws zoo ib yam. Feem ntau, nws raug tswj tsis pub dhau 5 feeb. Lub sijhawm nplawm ntev dua, lub sijhawm ua kom khov ntawm cov hmoov gypsum sai dua. Ua tib zoo saib xyuas lub sijhawm teeb tsa ntawm lub tsev gypsum hmoov los tiv thaiv kev tawg ntawm gypsum hmoov.
