1. Qee daim ntawv tso quav tso zis ntau dua rau qhov kov, thiab hom ntawv no muaj qib qis dua. Vim tias, nyob rau hauv tib qhov hnyav, muaj tsawg dua cov nplooj ntawv tuab. Piv txwv li, daim ntawv D-qib muaj txog 270 lossis ntau nplooj ntawv ib 500 grams, thaum E-qib ntawv tsuas muaj 250 lossis tsawg dua. Yog li, rau tib qhov hnyav, nws raug nquahu kom xaiv ib lub hnab nyias nyias ntawm daim ntawv tso quav.
2. Vim tias daim ntawv tso quav tso zis yog muag los ntawm qhov hnyav, qee tus neeg tsim khoom tuaj yeem ntxiv cov fillers ntxiv thaum lub sijhawm tsim khoom. Cov ntawv uas tsim los ntawm txoj kev no yog ob qho tib si tuab thiab tawv, uas ua rau muaj kev pheej hmoo rau tib neeg kev noj qab haus huv. Yog li, thaum yuav khoom, koj yuav tsum xaiv cov ntawv tso quav tso quav nrog cov ntaub ntawv softer.
3. Tag nrho cov txheej txheem ntawm kev tsim cov ntawv tso quav tso quav yog ua tiav ntawm qhov kub thiab txias. Yog tias lub ntim tsis tau raws sijhawm, tsis tiav, lossis khaws cia tsis raug, nws tuaj yeem ua rau cov ntaub ntawv ya raws thiab muaj kuab paug. Yog li, thaum xaiv, nws yog ib qho tsim nyog yuav tsum xaiv cov khoom uas tau ntim zoo thiab muaj hnub tsim khoom ze dua.
4. Ua tib zoo saib xyuas cov qauv kev lag luam (QB2500-2000) ntawm Ministry of Light Industry rau daim ntawv tso quav tso quav, uas faib cov ntaub so quav rau hauv ob hom: daim ntawv yob me me thiab daim ntawv txiav riam. Cov kev ntsuas tau muab faib ua tsib theem: A, B, C, D, thiab E. Daim ntawv tso quav tso nrog rab riam yog ob theem: D thiab E. Thaum yuav khoom, thov xyuam xim rau cov ntawv ntawm lub ntim. Yog tias tus qauv ua tiav tau qhia rau ntawm nws: GB2500-2000 D-1, nws qhia tias daim ntawv tso quav tso rau qib D thiab muaj qhov zoo.