Rau ntim khoom noj, txhua ntim yog ua los ntawm cov khoom sib xyaw. Feem ntau, yuav tsum muaj ntau dua ob txheej los ua kom sib xyaw. Nov yog qhia txog kev xaiv cov txheej txheem ntim cov hnab ntim khoom sib xyaw. Cov ntsiab lus muaj raws li hauv qab no:
1. Cov khoom siv saum npoo av: Feem ntau cov khoom siv uas tsis yog cua sov yuav tsum tau txiav txim siab xaiv cov ntaub ntawv uas muaj cua sov zoo thiab ua kom sov me me, xws li BOPA, BOPET, BOPP, thiab lwm yam khoom siv ua thawj qhov kev xaiv.
2. Cov khoom siv sab hauv. Ntawd yog, cov khoom siv cua sov tuaj yeem ua kom sov tau kaw ntawm 30 degrees qis dua qhov kub sib txawv ntawm qhov kub ntawm qhov khoom siv. Yog tias qhov kub sib txawv ntawm qhov kub sib txawv ntawm cov khoom siv saum npoo av thiab cov khoom siv ua kom sov tau tsawg dhau, nws yuav coj teeb meem rau qhov ntsuas kub ntawm lub hnab, vim tias yog tias qhov kub tau qis dua, kev sib khi nrawm yuav tsis zoo, uas yuav tsis ntsib qhov yuav tsum tau ua. Txhawm rau txhim kho kev sib khi nrawm, qhov kub yuav nce ntxiv. Vim tias qhov sib txawv ntawm qhov kub thiab txias ntawm cov khoom siv sab hauv thiab txheej txheej sab nraud tsawg dhau, cov khoom siv saum npoo yuav kub hnyiab tau yooj yim.
Rau tib cov khoom siv cua sov sib khi, nws cov cua sov sib khi lub zog yuav nce ntxiv raws li cov tuab ntawm cov khoom siv cua sov sib khi nce. Yog li ntawd, cov khoom siv sab hauv ntawm lub hnab ntim rov qab thiab lub hnab ntim khoom yuav tsum siab dua 30C. Yog tias cov khoom siv sab hauv yog nyias dhau, Nws yuav cuam tshuam qhov nruj ntawm lub hnab tiav.
