1. Kev xaiv raws li cov ntaub ntawv sib txuas: Cov khoom sib txawv muaj cov yam ntxwv ntawm qhov sib txawv, yuav tsum tau xaiv cov khoom sib xws PU nplaum hom. Piv txwv li, cov ntaub ntawv ntxeem tau zoo tshaj plaws rau cov nplaum nrog qis viscosity.
2. Kev xaiv raws li ib puag ncig daim ntawv thov: xav txog yam xws li kub, av noo, thiab tshuaj lom neeg tshaj tawm. High- qhov kub thiab txias ib puag ncig yuav tsum tau cua sov- tiv taus PU nplaum, thaum qhov chaw ntub dej nyiam cov dej noo- kho cov nplaum.
3. Kev xaiv raws li cov kev xav tau ntawm kev ua haujlwm: Thaum muaj cov kev cai tshwj xeeb rau daim ntawv cog lus lub zog, kev yoog raws, lossis kev kho ceev, yuav tsum xaiv cov nplaum PU nrog cov qauv tsim nyog.
4. Kev xaiv raws li kev tsim kho: Xav txog cov khoom siv uas twb muaj lawm, kev ua haujlwm, thiab kev txwv sijhawm. Kev qeeb dua - hom kho tuaj yeem siv rau kev ua haujlwm ntawm phau ntawv, thaum ceev - hom kho yog tsim rau cov kab ntau lawm.
