"B" xaum muaj cov graphite softer. (Tus "B" sawv cev rau "dub".) Tus lej uas pom nyob rau hauv pem hauv ntej ntawm tsab ntawv qhia tias tus cwj mem muag muag li cas. Hauv lwm lo lus, tus cwj mem "4H" nyuaj dua li "2H" xaum thaum "4B" xaum yog softer dua "2B" cwjmem.
xaum dub thiab softest yog dab tsi?
B9 yog qhov softest thiab darkest. 9H yog lub teeb thiab nyuaj tshaj graphite mem hluav. Yog li B6 yog softer thiab tsaus dua li B2. Ib qho 6H yog ib qho nyuaj thiab sib zog dua 2H thiab hnyav dua thiab sib zog dua HB lossis B mem hluav.
HB mem hluav twg yog qhov tsaus thiab softer?
HB GRAPHITE SCALE
Qhov thib ob graphite grading scale yog hu ua HB nplai. Feem ntau cov xaum xaum sab nraud ntawm Teb Chaws Asmeskas siv qhov ntsuas no, siv tsab ntawv "H" los qhia txog cov cwj mem nyuaj. Ib yam li ntawd, tus neeg tsim cwj mem yuav siv tsab ntawv " B" txhawm rau xaiv qhov dub ntawm tus cwj mem lub cim, qhia tias cov hmoov txhuas softer.
Yuav ua li cas mem hluav yuav muab rau koj ib tug softer duab?
Kev kos duab, nws tseem nyuaj heev. Qhov ntau B's, softer tus cwj mem yog. Qhov no txhais tau hais tias 5B mem hluav yog softer dua 2B thiab 5B yuav tsim ib qho xim tsaus. Lub 7B yog qhov softest thiab darkest ntawm cov cwj mem (8B thiab 9XXB xaum txawm softer thiab darker).
Qhov twg tsaus 2B lossis 4B?
2B nyuaj dua 4B thiab 4B nyuaj duamas 6b. Txawm li cas los xij, tag nrho cov no yog nyob rau sab mos (B). Cov hauv qab no yog tus qauv ntsuas. Qhov nyuaj tshaj plaws yog sab laug, softest ntawm sab xis: 10H, 9H, 8H, 7H, 6H, 5H, 4H, 3H, 2H, H, F, HB, B, 2B, 3B, 4B, 5B, 6B, 7B, 8B, 8B, 10B.
