Piv nrog rau cov hniav zoo tib yam porcelain, tag nrho cov-ceramic hniav muaj cov hauv qab no zoo:
1. Tsawg dua cov hniav sib tsoo thiab tuav lawv tus kheej cov ntaub so ntswg ntau dua.
2. Kev sib xyaw ua ke ntawm cov yas hauv thiab sab nrauv tiv thaiv kev tev ntawm cov plooj (porcelain) thiab hlau, qhia txog qhov teeb meem ntawm cov hlau grey thiab dub.
3. Lub hardness ntawm tag nrho cov-porcelain zoo ib yam li cov hniav enamel, thiab tsis ua rau lub puab tsaig ntawm lub puab tsaig.
4. Tsis muaj cov kab dub ntawm ntug ntawm cov pos hniav, tsis hnyav, tsis muaj qhov liab, o thiab los ntshav ntawm cov pos hniav, yog li koj tuaj yeem hnov tias cov hniav tag nrho-ceramic yog zus los ntawm koj cov pos hniav.
5. Zoo pob tshab thiab refraction, tsis muaj kev txaj muag ntawm "cov hniav ntsuab flashing" nyob rau hauv lub teeb, thiab ua kom tiav cov hauj lwm tsis yooj yim sua ntawm cov hniav porcelain.
6. Lub zog ntawm cov khoom siv cobalt dioxide muaj zog yog piv rau cov hlau porcelain hniav, thiab tsis tas yuav txhawj xeeb txog kev tawg ntawm cov plooj (porcelain).