Mkati mwa thumba la inki muli chophimba chosefera, chomwe chimagwiritsidwa ntchito kwambiri kusefa zodetsedwa ndi inki, kuchepetsa mwayi wa pulagi ya nozzle, ngati sichinasinthidwe kwa nthawi yayitali, thumba la inki lidzakulitsa kwambiri mwayi wa kulephera kwa nozzle.

Zinthu zosagwirizana ndi dzimbiri, zonyansa zosefera za inki zolondola kwambiri, chitetezo champhamvu kwambiri cha mphuno, kukulitsa moyo wa nozzle.Zopanda mtengo, zotetezeka, pogwiritsa ntchito zida zoteteza chilengedwe, kuwongolera mosamalitsa maulalo opanga. Sinthani kapangidwe kake kamphamvu, inki imatha kutuluka bwino, kusindikiza bwino nthawi zonse inki