1, Kev faib tawm ntawm cov khoom siv yas: PET: belongs rau cov khoom siv tiv thaiv ib puag ncig, tuaj yeem tiv tauj ncaj qha nrog cov tshuaj pleev ib ce, khoom noj khoom haus, yog cov khoom tseem ceeb ntawm cov khoom siv tu tawv nqaij, PET cov khoom yog mos, cov xim ntuj yog pob tshab.
2, tshuaj pleev ib ce yog kiag li nyob ntawm lub ntim, tom qab lub zoo meej ntim kom muaj kev cuam tshuam nws cov yam ntxwv. Cov ntaub ntawv ntim khoom tseem ceeb yog: iav, plexiglass, yas yeeb nkab lub cev, lub thawv ntawv, thiab lwm yam., lub thawv ntawv feem ntau yog siv rau sab nrauv ntim. Txawm hais tias muaj ntau hom tshuaj pleev ib ce nyob rau hauv kev ua lag luam, ntau hom, tab sis nyob rau hauv cov nqe lus ntawm nws sab nraud daim ntawv thiab lub zog ntawm lub ntim, nws yog tsis muaj dab tsi ntau tshaj li cov nram qab no pawg: khoom tshuaj pleev ib ce, hmoov tshuaj pleev ib ce, kua tshuaj pleev ib ce, emulsion tshuaj pleev ib ce, muab tshuaj txhuam. tshuaj pleev ib ce, thiab lwm yam.