Kos xim: Thaum xaiv cov khob ntawv, tsis txhob saib seb lawv dawb npaum li cas. Qee cov tuam txhab lag luam ntxiv ntau cov tshuaj fluorescent whitening los ua kom lub khob zoo dua.
Txheeb xyuas qhov ruaj khov: Tsis txhob yuav cov khob ntawv uas muag muag thiab flimsy! Cov khob zoo li no tuaj yeem ua rau tawg. High-cov ntawv khob zoo yuav tsum muaj cov phab ntsa tuab, kom lawv tsis txhob deform thaum ntim dej lossis dej haus. Cov kws tshaj lij pom zoo tias cov khob ntawv zoo yuav tsum tsis txhob xau rau 72 teev, thaum tsis zoo - cov khoom zoo yuav xau tom qab ib nrab teev.
Ua kom tsw ntxhiab: Qee lub khob ntawv luam tawm nrog cov xim zoo nkauj thiab cov lus. Cov inks no muaj benzene thiab toluene, uas muaj teeb meem rau kev noj qab haus huv. Tshwj xeeb tshaj yog nrog cov khob ntawv ntub dej, tus number case sab hauv tuaj yeem cuam tshuam rau txheej sab hauv, yog li tsis txhob siv cov khob ntawv ntub dej. Nws yog qhov zoo tshaj plaws los xaiv cov khob ntawv uas tsis muaj lossis tsawg tus cwj mem luam ntawv ntawm txheej txheej.
Sib txawv ntawm cov khob kub thiab txias: Cov khob ntawv pov tseg feem ntau muab faib ua khob dej txias thiab khob dej kub. Lawv txhua tus muaj lawv lub hom phiaj, yog li tsis txhob cuam tshuam lawv. Cov khob dej txias yog rau cov dej txias, thiab cov khob dej kub yog rau cov dej kub kub; txwv tsis pub, nws yuav muaj kev cuam tshuam tsis zoo rau koj txoj kev noj qab haus huv.
