... rigidity and weight, the main specialities are following:1) it is hard to scratch by the kitchenware, like knife, scoop or turner, for ... is up to 93%, the rigidity is just less than the diamond;2) it is hard to dirty, acid and alkali proof, easy to clean;3) it is ... polish working procedures;5) fire-resistant, the melting point is up to 1300 centigrade;6) non-noxious, no radiation, environment-friendly ...