Hauv kev lag luam muab cov khoom siv kho tsheb, txawm hais tias siv ntau cov ntaub ntawv siv, muaj cov khoom siv ib puag ncig uas yog qhov tseem ceeb heev, uas yog, cov khoom siv PVC ua npuas ncauj, uas yog qhov khoom siv tsis tau. Nws lub ntsiab kom zoo dua yog tsis-nplaum. Thiab qhov adhesion no muaj zog heev. Ntawm cov lev tsis laub cov khoom siv, cov khoom siv no feem ntau siv, yog tias koj xav ntxuav cov tshauv ntawm daim lev tsis-plam.
Hauv kev lag luam muab cov khoom siv kho tsheb, txawm hais tias siv ntau cov ntaub ntawv siv, muaj cov khoom siv ib puag ncig uas yog qhov tseem ceeb heev, uas yog, cov khoom siv PVC ua npuas ncauj, uas yog qhov khoom siv tsis tau. Nws lub ntsiab kom zoo dua yog tsis-nplaum. Thiab qhov adhesion no muaj zog heev. Ntawm cov lev khoom uas tsis yog-cov khoom muag, cov khoom siv no feem ntau siv. Yog tias koj xav ntxuav cov hmoov av ntawm daim lev tsis tau, koj tuaj yeem ntxuav nws nrog dej sai. Vim tias nws cov hauj lwm zoo ib puag ncig, rau cov neeg xav tau nws, lawv txaus siab rau cov khoom siv no ntau heev.