Cov dej qab zib tau dhau los ua cov khoom lag luam tseem ceeb hauv tib neeg kev noj txhua hnub.Txawm li cas los xij, vim muaj kev hloov pauv ntawm tib neeg lub tswv yim noj rau kev noj qab haus huv thiab kev nyab xeeb thiab kev tswj xyuas nruj dua cov qauv kev lag luam dej qab zib tau siv los ntawm lub xeev, kev hloov kho cov khoom lag luam thiab cov txheej txheem kev kho dua tshiab yuav tshwm sim.Dongguan Kinda pom kev daws teeb meem thiab cov khoom lag luam npog cov qauv tsim nyog rau kev pom thiab kev sib cais ntawm cov dej qab zib los pab cov neeg siv khoom kom ntseeg tau cov khoom ua raws, kev noj qab haus huv zoo nkauj thiab tuav cov tsw tsw.
Cov khoom siv tseem ceeb ntawm cov dej qab zib yog cov dej haus, cov hauv paus hniav, stems, nplooj, paj thiab txiv hmab txiv ntoo ntawm cov nroj tsuag, cov kua qaub, cov khoom noj ntxiv nrog rau cov khoom qab zib, qaub, flavors, fragrances, zaub mov colouring stabilizers thiab preservatives, thiab qee qhov ntxiv rau. gases (nitrogen, carbon dioxide, thiab lwm yam) los txhawb kev saj thiab kev paub ntawm cov khoom.Nyob rau hauv cov txheej txheem ntau lawm, sterlization, particle thiab impurity interception, meej meej, thiab lwm yam kev koom tes nyob rau hauv cov txheej txheem yuav muaj kev cuam tshuam rau qhov kawg khoom zoo, yog li nws yog ib qho tseem ceeb heev uas yuav tau xaiv cov khoom tsim nyog pom.