Kapangidwe ka njerwa zapamwamba-zofanana kwambiri ndi njerwa zamoto; komabe, amasiyana malinga ndi kuchuluka kwa zinthu zowerengeka (chamotte) zomwe zimagwiritsidwa ntchito, kutentha kwamoto, komanso kuchuluka kwa makina. The raw material-bauxite-amapangidwa calcination, kuphwanyidwa, kuchotsa chitsulo, kusakaniza, kukanikiza, kuyanika, ndi kutentha kwambiri{4}}asanapake ndi kusungidwa. Kutentha kwa sintering nthawi zambiri kumachokera ku 1400 mpaka 1500 digiri, ndi njira zina zomwe zimafika mpaka 1700 digiri.
Kupanga njerwa zapamwamba-ndizovuta kwambiri, ndipo gawo lililonse limakhala lovuta kwambiri, zomwe zimapangitsa kuti pakhale chopangidwa chapamwamba kwambiri kuposa njerwa zomangira.