1.Nitrocellulose thiab epoxy resin yuav tsum zam rau cov kub-kub hmoov. Vim tias ob leeg yuav sib zog ua ke nrog tooj liab los tsim cov ntawv ua kua; yog tias ob txoj hlua hluav taws xob no yuav tsum tau siv, lawv yuav tsum siv hauv lub sijhawm luv luv kom ntau li ntau tau.
2. Txij li thaum acidity yuav oxidize thiab blacken lub tooj liab thiab kub hmoov, resins nrog tus nqi acid tsawg (tsawg dua 3) yuav tsum siv ntau li ntau tau. Qhov qis dua cov kua qaub tus nqi ntawm cov kab ke ua ke, zoo dua.
3. Cov roj av uas muaj ntxhiab tsw ntxhiab thiab ester cov kuab tshuaj pab kom ntub dej ntawm tooj liab thiab kub hmoov hais kom ua tiav tag nrho kev tawg. Txav deb ntawm kev siv dej cawv thiab ketone cov kuab tshuaj thiab cov tshuaj solute acidid lipid.
4. Lub ntsej muag tooj liab-kub tau yooj yim oxidized thaum raug dej, yog li nco ntsoov siv cov siab-purity resins thiab cov kuab tshuaj (cov ntsiab lus tsis muaj dej). Yog tias muaj qhov dej me me, nws raug nquahu kom siv cov tshuaj molecular sieve silosievea4 lossis aerosilr972 kom tshem tawm cov dej ua ntej yuav ntxiv cov hmoov kub xim.