[1] Daim iav yuav tsum muab tso rau hauv qhov chaw qhuav kom tsis txhob raug cuam tshuam los ntawm noo noo ntau li ntau tau. Tsis txhob siv tes ntub dej los yog cov ntaub ntub dej kov, so daim iav, kom daim iav ntub dej, ua rau cov txheej txheem kho qhov muag ntawm daim iav metamorphism dub.
[2] Daim iav yuav tsum tsis txhob sib cuag nrog cov kua qaub thiab alkali thiab roj tshuaj, uas yooj yim rau corrode daim iav.
[3] Daim iav yuav tsum tau muab so nrog ib daim ntaub mos mos kom tiv thaiv daim iav los ntawm kev txhuam.
[4] Lub thav duab yuav tsum tau ntxuav nrog cov ntaub mos mos los yog paj rwb kom tsis txhob xeb.
[5] Daim iav chav da dej tuaj yeem smeated rau ntawm nws qhov chaw nrog xab npum ua ntej da dej, thiab tom qab ntawd so nrog cov ntaub qhuav. Ib txheej ntawm xab npum kua zaj duab xis tuaj yeem tsim rau ntawm daim iav saum npoo, uas tuaj yeem tiv thaiv daim iav plooj.
[6] Daim iav ntshai tsam ya raws vim iav iav feem ntau txiav ua ntej siv. Dej vapor yooj yim los ntawm kev txiav sab rau hauv daim iav, corrosion ntawm daim iav, mildew, xeb me ntsis. Txhawm rau tiv thaiv qhov no, cov neeg siv tuaj yeem siv cov xim pleev xim rau ntawm sab ntawm daim iav thiab tseem nyob tom qab tom qab lawv yuav rov qab.
[7] Muab cov ntaub qhwv qhuav rau hauv qhov tsim nyog ntawm cov tshuaj ntxuav tes los yog cov toner los yog cov tshuaj ntxuav tes thiab smear rau ntawm daim iav saum npoo, sib npaug. Cov khoom xyaw nquag uas ntxuav tus ntsuj plig muaj, tuaj yeem tiv thaiv dej vapor kom condense hauv chav dej iav ntsej muag zoo, tuaj yeem muaj cov nyhuv antifogging zoo heev.
[8] So daim iav chav dej nrog cov ntawv roj absorbent thiab cov txiaj ntsig tau zoo heev. Ntxiv rau tam sim no muaj pos huab-pov thawj lo ntsiab muag ntawm kev lag luam muag, yeej yog txheej pos huab-pov thawj lo ntsiab muag thiab hluav taws xob cua sov pos huab-pov thawj lens. Cov qub tiv thaiv cov pos huab los ntawm txheej pores; Cov tom kawg yog hluav taws xob rhuab los tsa cov av noo ntawm daim iav, yog li cov huab cua evaporates sai sai thiab tsis tuaj yeem tsim cov pos huab, tab sis lawv yog cov iav chav dej kim.
