Lub siab ua kom tsis muaj menyuam qhov taw qhia daim kab xev yog ua los ntawm cov ntaub ntawv kho mob raws li cov khoom siv hauv paus, ua los ntawm cov khoom siv hluav taws xob tshwj xeeb-sensitive tshuaj dyes, cov neeg tsim xim thiab nws cov ntaub ntawv pabcuam rau hauv tus number case, coated nrog cov xim hloov xim raws li qhov ntsuas kom tsis muaj menyuam, thiab coated nrog lub siab. -sensitive nplaum rau sab nraub qaum Nws yog luam tawm ntawm daim kab xev tshwj xeeb hauv kab kab txaij;nyob rau hauv qhov kev txiav txim ntawm saturated chav ntawm ib tug tej yam kub thiab siab, tom qab ib tug sterilization voj voog, qhov taw qhia yuav grey-dub los yog dub, yog li tshem tawm cov kab mob qhia muaj nuj nqi.Nws yog tshwj xeeb tshaj yog siv rau pasting rau ntawm pob khoom kom tsis muaj menyuam thiab siv los qhia seb lub pob khoom puas tau raug rau cov txheej txheem siab ua kom tsis muaj menyuam, thiaj li tiv thaiv kev sib xyaw nrog cov pob khoom uas tsis tau sterilized.