Drawing cwj mem yog cwj mem tshwj xeeb tsim los kos duab thiab feem ntau muaj cov yam ntxwv hauv qab no:
Cov khoom siv lead ua: Cov hlau lead ntawm kos duab xaum yog tsim los ntawm kev sib xyaw ntawm graphite thiab av nplaum. Qhov sib txawv proportions txiav txim siab hardness thiab darkness ntawm cov hlau lead. Cov qib hardness feem ntau los ntawm cov mos mus rau qhov nyuaj, muab faib ua B series (xws li 2B, 4B, 6B, thiab lwm yam, uas yog softer thiab darker) thiab H series (xws li 2H, 4H, thiab lwm yam, uas nyuaj thiab sib dua).
Barrel Design: Feem ntau yog ua los ntawm ntoo, kom yooj yim sharpening thiab xis tuav. Qee tus cwj mem kos duab kos duab yuav muaj cov qauv tsis muaj xim kom tsis txhob cuam tshuam qhov kev xav.
Siv: Haum rau kev kos duab, duab ntxoov ntxoo, kab kos duab, thiab lwm yam kev tsim duab kos duab. Cov cwj mem sib txawv tuaj yeem siv los ua kom tiav cov duab sib txawv, xws li cov ntsiab lus hauv qhov tsaus ntuj lossis qhov tseem ceeb.
Hom thiab Zoo: Kev kos duab cwj mem hom feem ntau tsom ntau rau qhov sib xws thiab ua haujlwm ntev ntawm cov hlau lead.