1. Tau txais qhov tiav ci ntsa iab hauv lub sijhawm luv luv.
2. Siv rau kev sib tsoo thiab txhuam ntawm ntau yam pob zeb, pem teb pob zeb thiab cov khoom siv ceramic tshwj xeeb. Xws li granite, marble, microcrystalline pob zeb, siv lead ua, quartz pob zeb, ceramics thiab lwm yam.
3. Kev txhuam ntub los yog qhuav.
4. Ntse thiab hnav-resistant.