roa kākano 3mm
Ko te kāri 3mm karbona he mahaara hou whakamua, e whakaae ana i ngā pai ake o te rangatohu me te waeke iti noa. Ko tēnei mahaara whakarite ko ngā rau karbona ā-wheako i whakapai ki runga i te hara epokī matataki, i hanga noa hei whiwhi i te paenga 3mm. Kei te mōhio tonu tēnei kāri i ngā āhuatanga pūmotu pai, inahoki te kaha nui i te whanaketanga, te korengitanga pai, me te whiuwehitanga tino maia ki te porotaka me te kuhu. Ki te whakarite rawa i tana wawe me te pai o te haere, ka pai noa ia hei whakamahi mo ngā momo whakamahi e hiahiatia ana ngā āhuatanga taumata. Hei tūtohi hoki ngā āhuatanga matua o te mahaara nei, inahoki te maia pai ki te porotaka, te wawe iti o te whakapaku huringa ā-hua, me te kaha pai ki te whakarite i ngā rerekētanga, ka pai ia hei whakamahi mo ngā taiao e hiahia ana ki te tirotiro. I ngā whakamahi pakihi, ko te kāri 3mm karbona he mahaara tuatahitia mo ngā komihana roroi, ngā whenu motokā, me ngā whakawhitinga mahi tino pai. Ka whai ake anō tana whakamahi ki ngā āhua hunga, ngā whakariterite tūmatanui, me ngā kaupapa hanga hei whakaiti i te waeke, engari kaore i te whakaiti i te katoatoa o te whakaputanga. Ko te matawhāiti pai o tana upoko me te pai o tana kitea kei te whakamahi tūmatawhāiti hoki ia i ngā whakamahi tūmatawhāiti me te hanga o ngā mea whakahirahira. Ki te whakapakari i ngā āhuatanga pai me te whakarite, ka whakatūria anō hoki te kāri 3mm karbona hei whakatakoto i ngā ture hou mo ngā mahaara matataki.