Dej cwj mem: Qhov no yog lub npe nrov rau pej xeem. Qee tus neeg hu rau tus cwj mem kos npe dej cwj mem, qee tus hu ua roj-raws li cwj mem dej cwj mem, thiab qee tus hu cov cwj mem dej. Txawm li cas los xij, cov neeg uas muaj tus cwj mem tau siv los hu lawv cov cwj mem dej, yog li tsis muaj dab tsi tsis raug rau lub npe no. Cov ntawv sau ua haujlwm tshaj lij.
Dej-raws li cwj mem: lub ntsiab tivthaiv yog dej, dej-resistant pigment. Nws tsis yaj thiab smudge thaum raug dej. Feem ntau, nws yog siv rau kos kab hauv kos duab paintings. Nws yog tus cwj pwm los ntawm tsis muaj smudge ntawm daim ntawv thiab tsis muaj ntxhiab tsw. Cov khoom lag luam sawv cev xws li paj ntoo paj ntoo dej-raws li koob cwj mem, Mitsubishi cov dej-raws li cov cim. tuaj yeem tshem tawm nrog cov kuab tshuaj organic;
Dej-soluble cwj mem: Cov khoom tseem ceeb yog dej, xim, thiab cob. Nws feem ntau yog siv rau kev lag luam kos npe. Tus number case yog hydrophilic thiab yuav yaj thaum nws ntsib dej. Hauv cov txheej txheem kev lag luam, cov cim yuav tsum tau yooj yim tshem tawm, yog li cov cwj mem dej-soluble tau xaiv cov cwj mem, yog li lawv tseem hu ua cov cwj mem ntub dej. (Whiteboard markers feem ntau hu ua qhuav lwv cwjmem);
Roj-raws li cwj mem: feem ntau yog cov organic solvent formulas, xws li cawv (xws li ethanol), ketones (xws li acetone), benzenes (xws li xylene). Qhov ruaj khov, tsis hnov tsw, thiab ua kom qhuav sai ntawm cov mis yog txawv. Cov yam ntxwv yog tias tus number case yog waterproof, ruaj thiab tsis yooj yim rau ploj, thiab xim yog ci. Tab sis daim ntawv sau yuav smudge.
