1. Cov xim xav tau ntawm cov kua nplaum yuav tsum txawv. Yog tias daim nplaum nws tus kheej tsis muaj qhov tshwj xeeb xav tau ntawm cov xim, nws raug nquahu kom siv cov xim kub yaj kua nplaum. Feem ntau hais lus, daj kub yaj lub nplaum muaj viscosity zoo dua li dawb.
2.Qhov kev kho deg ntawm txoj kab txaij. Cov kev kho saum npoo ntawm kub yaj nplaum nplaum tsis yog nruj dua li lwm cov nplaum, tab sis cov hmoov av thiab roj rau ntawm cov nplaim nplaum kuj yuav tsum tau kho kom zoo kom ua rau cov kub yaj nplaum nplaum ua lub luag haujlwm zoo dua hauv kev ua kom zoo.
3. Lub sijhawm ua haujlwm. Kev ua haujlwm nrawm yog qhov tseem ceeb ntawm cov nplaim kub nplaum. Lub sijhawm ua haujlwm ntawm cov kua nplaum kub yaj feem ntau yog 15 feeb. Nrog rau kev thov dav ntawm cov txheej txheem niaj hnub ntau lawm-sib dhos cov kab, cov sijhawm ua haujlwm cov cai rau kub yaj cov nplaum tau txais luv thiab luv, xws li phau ntawv khi thiab kev hais lus kev tsim khoom rau kub yaj cov nplaum. Nws yuav siv sijhawm li 5 feeb.
Thib plaub, tiv taus rau qhov kub thiab txias. Kub yaj nplaum ua rau nkag siab kub. Thaum twg qhov kub tau mus txog ib qib, cov nplaum kub yaj pib yaj. Hauv qab ntawm qee qhov kub thiab txias, cov nplaum kub yaj yuav ua nkig, yog li qhov ntsuas kub hloov chaw ntawm cov chaw uas cov khoom lag luam xaiv yuav tsum tau ua tib zoo xav.
Tsib, nplaum. Lub viscosity ntawm kub yaj cov nplaum yog muab faib rau cov viscosity thaum ntxov thiab lig viscosity. Tsuas yog thaum pom cov viscosity thaum ntxov thiab lig viscosity zoo ib yam tuaj yeem ua tau cov nplaum kub yaj thiab lub substrate yuav nyob ruaj khov. Hauv cov txheej txheem ntau lawm ntawm kub yaj lub nplaum, nws yuav tsum ua kom ntseeg tau tias nws muaj kev tiv thaiv oxidation, halogen tsis kam, acid thiab alkali tsis kam thiab plasticity. Ua raws li cov khoom siv kom sib raug zoo, qhov viscosity ntawm cov yaj kub yaj nplaum kuj tseem muaj qhov sib txawv. Yog li no, sib txawv kub yaj kua nplaum yuav tsum tau xaiv raws li cov ntaub ntawv sib txawv.