Kev lag luam luam ntawv thiab dyeing yog ib qho kev lag luam uas muaj feem ntau ntawm cov dej phwj tuaj kho. Kev luam ntawv thiab dyeing dej khib nyiab yog cov dej khib nyiab tawm ntawm cov chaw luam ntawv thiab dyeing feem ntau ua cov paj rwb, hemp, tshuaj fibers thiab lawv cov khoom sib xyaw. Vim muaj cov impurities loj, chroma loj thiab cov ntsiab lus organic siab nyob rau hauv cov luam ntawv thiab dyeing dej phwj tuaj, nws yog ib qho tsim nyog yuav tau siv polyaluminum chloride, polyacrylamide thiab activated carbon los koom tes.
Polyaluminium chloride yog lub tshuab lim dej tshiab hauv kev ua lag luam nyob rau xyoo tas los no, nrog ntau tus neeg saib xyuas dej huv. Kev lag luam qib polyaluminium chloride feem ntau yog daj thiab xim daj, thiab cov ntsiab lus qis dua 28%.
Polyaluminium chloride rau cov dej haus, tseem hu ua polyaluminum chloride rau cov tuam txhab dej, yog lub teeb daj lossis daj-dawb hmoov. Txhua qhov ntsuas tau mus txog GB15892-2009 kev kho dej kom huv. Tom qab tau lim los ntawm ntau yam khoom siv lim phaj, cov ntsiab lus ntawm cov dej tsis haum yog txo qis, thiab 10% aqueous tov yog lub teeb daj pob tshab kua. Nws tuaj yeem ua kom tus neeg siv lub raj xa dej kom zoo thiab txhim kho kev siv cov tshuaj, uas tsis tuaj yeem ua tiav los ntawm cov txheej txheem ntuj sedimentation. Ntxiv nrog rau qhov tsis muaj dej-insoluble teeb meem tsawg, cov ntsiab lus ntawm cov hlau hnyav thiab lwm yam khoom tsis zoo kuj tseem me me, yog li cov khoom no yog ib qho kev pom zoo.