鉛(qian)筆硬(ying)度(du)(du)計(ji)是用(yong)(yong)于涂(tu)(tu)料(liao)、油墨開發制造檢測(ce)的儀器，寬泛用(yong)(yong)于涂(tu)(tu)料(liao)，油墨，顏料(liao)，紙張、公路等行業。BY 鉛(qian)筆硬(ying)度(du)(du)計(ji)按GB/T6736-2006、ASTM D 3363設計(ji)，經過(guo)以一定(ding) 硬(ying)度(du)(du)標(biao)(biao)號(hao)的鉛(qian)筆在干燥后(hou)的涂(tu)(tu)膜(mo)上(shang)劃(hua)痕(hen)，以未導(dao)致涂(tu)(tu)膜(mo)毀壞(huai)的zui硬(ying)鉛(qian)筆標(biao)(biao)號(hao)來表(biao)示。鉛(qian)筆硬(ying)度(du)(du)計(ji)具備體積(ji)小、操(cao)作(zuo)簡(jian)便科學等特(te)點，可用(yong)(yong)于試驗室，也可用(yong)(yong)于施(shi)工現場，并能任(ren)意在方向上(shang)對(dui)涂(tu)(tu)膜(mo)硬(ying)度(du)(du)實(shi)行測(ce)驗。

工作原理：
鉛(qian)(qian)筆(bi)(bi)硬度計主由(you)鉛(qian)(qian)筆(bi)(bi)架(jia)和實(shi)(shi)(shi)驗(yan)臺(tai)組(zu)成(cheng)，鉛(qian)(qian)筆(bi)(bi)架(jia)與(yu)立柱等(deng)組(zu)成(cheng)四連桿構造(zao)，保(bao)障(zhang)了砝碼的重(zhong)量垂直作用(yong)于鉛(qian)(qian)筆(bi)(bi)芯與(yu)實(shi)(shi)(shi)驗(yan)臺(tai)的交點上(shang)，并(bing)使鉛(qian)(qian)筆(bi)(bi)與(yu)實(shi)(shi)(shi)驗(yan)臺(tai)成(cheng)45°夾(jia)角，并(bing)維持不變。實(shi)(shi)(shi)驗(yan)臺(tai)可橫向、縱向移動，用(yong)它固定涂料(liao)樣(yang)板(ban)，并(bing)使樣(yang)板(ban)朝著劃(hua)痕方向滑動，鉛(qian)(qian)筆(bi)(bi)就在試片(pian)上(shang)劃(hua)出(chu)相(xiang)應軌(gui)跡(ji)來。換用(yong)不同鉛(qian)(qian)筆(bi)(bi)劃(hua)不同痕跡(ji)，據此可斷定涂膜(mo)的硬度值。

操作順序：
把試樣固定在水平臺面上，握住已削磨的(de)(de)(de)鉛(qian)(qian)筆(bi)(bi)使其與涂(tu)(tu)(tu)層成45°角，用力(li)以約(yue)1mm/s的(de)(de)(de)速度(du)向前推動(dong)，用力(li)程度(du)以使鉛(qian)(qian)筆(bi)(bi)邊(bian)緣破(po)碎或犁(li)破(po)涂(tu)(tu)(tu)層為宜。從zui硬(ying)的(de)(de)(de)鉛(qian)(qian)筆(bi)(bi)開(kai)始(shi)，用每級鉛(qian)(qian)筆(bi)(bi)劃5次，5次中若(ruo)有(you)兩次能犁(li)破(po)涂(tu)(tu)(tu)層則換用較(jiao)軟的(de)(de)(de)鉛(qian)(qian)筆(bi)(bi)一(yi)支，直(zhi)至(zhi)找出5次中至(zhi)多(duo)有(you)4次不能犁(li)破(po)涂(tu)(tu)(tu)層的(de)(de)(de)鉛(qian)(qian)筆(bi)(bi)為止，此鉛(qian)(qian)筆(bi)(bi)的(de)(de)(de)硬(ying)度(du)即為被(bei)測涂(tu)(tu)(tu)層的(de)(de)(de)鉛(qian)(qian)筆(bi)(bi)硬(ying)度(du)。