Ndi mtundu wa chipangizo chophikira chozungulira, chomwe chimagwiritsidwa ntchito muukadaulo wa alkali kapena sulphate pulping, kuphika tchipisi tamatabwa, nsungwi, udzu, bango, thonje, phesi la thonje, bagasse. The mankhwala ndi zopangira akhoza kusakaniza bwino mu ozungulira digester, linanena bungwe zamkati adzakhala wabwino evenness, kumwa madzi pang'ono, mkulu kugwirizana mankhwala wothandizila, kufupikitsa nthawi kuphika, zida zosavuta, ndalama otsika, kasamalidwe mosavuta ndi kukonza.