Ntawm zaj lus qhia nrog cov menyuam yaus, lawv tau ua ntoo hlaws, lub thoob dej npog nrog plaster, dej, dej - mus rau qhov sib xws ntawm tuab qaub cream. Cov menyuam yaus tseem tau ua tiav cov yam xav tau, cov khoom ua tau ntau npaum li no gypsum uas lawv xav tau ntau tshaj 10% ntawm kev sib xyaw ntawm lawv vwm. Gypsum freezes sai sai, yog li nws yog ib qho tsim nyog rau kev txua sai uas cov seem uas seem ntawm cov seem. Lub raj mis tig mus rau ntawm tes, nws tau qhuav nrog plaster, hauv cov plaster tshiab yuav tsim nyog rau cov kua nplaum thiab dai kom zoo, tus gypsum twb khov -
Lawv pleev xim rau lub qhov taub ib txwm nyob rau hauv xiav, ntshav, cov xim ntawm lub hiav txwv yoj, ces cov ntsev, hlaws dai tau twb nplaum ntawm PVA, ib me ntsis nyiaj xim. -
Tus qauv yog qhov nthuav heev.
Tej zaum, nws yuav tsim nyog los rov ua dua sab qaum, thiab tom qab ntawd cov tshuaj no ua rau tsis haum.