9B graphite mem hluav yog tsim los rau cov neeg ua yeeb yam uas xav tau qhov siab tshaj plaws tonal tob thiab softness hauv lawv txoj haujlwm. Tsis zoo li cov qib nyuaj xws li HB lossis 2H, nws muaj cov graphite siab dua - rau - av nplaum piv, ua rau ib daim ntawv thov tsaus, smoother. Thaum siv 9B graphite mem hluav, nws yog ib qho tseem ceeb uas yuav tsum tau ua tib zoo tswj lub siab, txawm tias lub teeb strokes tuaj yeem tsim cov nplua nuj, ntom ntom. Qhov no ua rau nws zoo tagnrho rau kev ntxoov ntxoo, sib xyaw, thiab tsim qhov sib txawv hauv cov duab kos lossis kos duab tiag tiag. Hais txog cov txheej txheem, cov kws ua yeeb yam feem ntau muab cov txheej txheem thiab smudging kom ua tiav qhov kev sib tw du. Los ntawm kev xav hauv kev lag luam, qhov kev thov rau cov xaum muag muag tau loj hlob nrog cov qauv zoo nkauj thiab cov duab kos duab, tshwj xeeb tshaj yog hauv cov duab kos duab thiab cov tswv yim kos duab. Cov nqi ntawm cov khoom siv raw, tshwj xeeb tshaj yog graphite purity, cuam tshuam ncaj qha rau kev ua haujlwm, ua tus nqi hwm -qib cwj mem zoo sib xws hauv cov zis.
Los ntawm cov khoom muag pom, xaum feem ntau muab faib ua H (nyuaj), HB ( nruab nrab), thiab B (mos), nrog 9B graphite mem hluav zaum ntawm qhov muag muag kawg. Piv nrog rau charcoal, nws muaj kev tswj ntau dua thiab tsis sib haum xeeb, thaum tseem ua tiav qhov tob zoo sib xws. Ib qho tseem ceeb sib txawv ntawm cov khoom zoo sib xws yog nyob rau hauv cov ntsiab lus tseem ceeb thiab cov ntoo casing zoo, uas cuam tshuam rau kev ua kom ntev thiab kev ua haujlwm tawg. Thaum siv 9B graphite mem hluav, cov txheej txheem pom zoo suav nrog lub teeb kos duab, maj mam ua kom tsaus, thiab ua tiav nrog cov cuab yeej sib xyaw xws li cov ntaub so ntswg lossis cov ntawv. Kev tsim kho tsis ntev los no hauv cov saw hlau graphite tau pom qhov hloov pauv vim kev cai mining thiab ib puag ncig cov cai, uas yuav cuam tshuam rau tus nqi thiab muaj. Rau cov neeg yuav khoom thiab cov neeg xa khoom, kev nkag siab txog cov xwm txheej no pab xaiv cov neeg muag khoom txhim khu kev qha thiab tswj xyuas cov khoom zoo ib yam hauv kev ua lag luam.