Lub hnab ntim khoom yog cov khoom ntim yas loj uas siv tau yooj yim thiab tuaj yeem nqa tau ntau yam khoom thiab cov khoom siv ib zaug. Nws yog qhov tseeb vim tias qhov no ntau thiab ntau lub hnab ntim tau siv, tshwj xeeb tshaj yog thaum cov khoom siv hmoov siv hauv cov khoom ntxhia, cov thawv ntim khoom tuaj yeem txuag tau ntau lub zog thiab cov khoom siv. Yog li ntawd, nws tau coj mus rau kev loj hlob ntawm ob txhais tes ntim hnab. Yog li yuav ua li cas peb rov ua dua cov hnab ntim khoom no?
Thaum siv cov hnab yas polyethylene los ua cov hnab yas rov ua dua tshiab, cov lus thiab cov qauv luam tawm ntawm lawv qhov chaw cuam tshuam qhov zoo ntawm cov khoom. Yog li, dab tsi raw cov ntaub ntawv siv los luam cov qauv thiab cov ntawv? Puas yog ink lossis xim? Dab tsi tuaj yeem siv los ntxuav cov khoom no yam tsis muaj kev puas tsuaj rau cov yas nws tus kheej? Qhov pheej yig dua qhov kev pab yaug koj siv, qhov zoo dua. Tsis muaj lwm txoj hauv kev yooj yim los ntxuav nrog acetone, tab sis koj yuav tsum tau xyuam xim rau kev tiv thaiv hluav taws thiab tiv thaiv volatilization thiab lom. Koj yuav tsum ua haujlwm nyob rau hauv qhov chaw uas muaj qhov cua thiab siv qhov ntsuas hluav taws kub.