Pretreatment ua ntej txau yog ib qho tseem ceeb ntawm kev tsim thiab kev ua ntawm txhuas veneer. Nws luv, tab sis nws tseem ceeb. Feem ntau, cov txheej txheem feem ntau muaj kev sib tsoo, polishing thiab soaking hauv cov tshuaj sib txawv. Txij li thaum tag nrho cov txheej txheem yog qhov tseem ceeb, aluminium veneer ua tiav los ntawm cov txheej txheem no yuav muaj qee yam tshwj xeeb.
Ua ntej tshaj plaws, qhov saum npoo ntawm cov ntawv kho aluminium yog du thiab tiaj tus, thiab tsis muaj qhov pom tseeb, xws li npuas thiab khawb.
Thib ob, tom qab dipping rau hauv cov tshuaj alkaline, cov roj thiab cov plua plav ntawm qhov chaw ntawm cov phaj txhuas raug tshem tawm tau zoo los npaj rau cov txheej txheem tom ntej, thiab qhov saum npoo ntawm txhuas phaj yog smoother.
Thib peb, ib zaj duab xis yog tsim nyob rau saum npoo ntawm aluminium veneer tom qab chromium plating, uas zoo txhim kho qhov hnav tsis kam ntawm cov hlau, txhim kho qhov ci thiab tawv tawv ntawm qhov chaw ntawm aluminium veneer, thiab tiv thaiv cov xim ntawm cov phaj txhuas.
Thaum kawg, cov txheej txheem nruab nrab yog ntxuav nrog dej ntxiv kom tshem tawm cov plua plav ntawm lub rooj tsavxwm thiab ua kom lub ntsej muag huv ntawm lub rooj tsavxwm. Tom qab kev kho mob saum npoo, qhov saum npoo ntawm aluminium phaj yog ci dua thiab huv si, thiab nws yooj yim dua rau adsorb cov txheej txheej txheej, kom cov nyhuv txheej yog ntau yam sib xws. Ob qho tib si nyob rau hauv qhov chaw thiab hauv qhov xwm txheej, nws yog qhov zoo dua li cov ntawv txhuas tsis kho.