Lub xeev tau hais tias cov khob ntawv pov tseg "tsis tuaj yeem muab ntxiv nrog cov tshuaj fluorescent whitening." Cov khob ntawv pov tseg tau muab faib ua khob dej txias thiab khob dej kub raws li lawv siv. Thaum siv los yog siv tsis raug, nws yuav cuam tshuam rau kev noj qab haus huv ntawm lub cev. Cov khoom siv raw ntawm txheej txheej dej tsis zoo hauv lub khob ntawv pov tseg yog polyethylene. Cov khob ntawv tsis zoo siv cov polyethylene rov siv dua, uas yuav tsim ntau yam teeb meem hauv cov txheej txheem ntawm kev ua thiab ntau lawm. Lub khob ntawv yog coated nrog ib txheej ntawm polyethylene waterproof zaj duab xis rau sab hauv kom ua tiav cov nyhuv ntawm dej rwb thaiv tsev.
Qhov saum npoo ntawm lub khob haus dej txias yuav tsum tau dipped los yog waxed kom ua tiav cov nyhuv ntawm cov dej tsis zoo. Thaum cov dej kub siab tshaj 62 degrees, qhov ruaj khov ntawm cov quav ciab tsis muaj zog thiab lub khob ntawv yuav mos. Tej zaum cov tshuaj carcinogenic yog noj nrog dej. Qhov saum npoo ntawm lub khob dej kub yog pasted los ntawm lub teb chaws lees paub, tshwj xeeb polyethylene zaj duab xis, zoo tshav kub tsis kam, tsis muaj tshuaj lom.
Tsis tas li ntawd, tseem muaj cov qauv kev cai rau cov tuab thiab permeability ntawm cov khob ntawv pov tseg, hauv qab thiab sab ntawm lub khob dej tsis tuaj yeem permeate, permeate, thiab daim ntawv tsis tuaj yeem muag muag heev.