... have oxidation reaction or rust, it is not afraid of acid or alkali, anti-corrosion, always keep its original color, ... ’ hardness is Vickers HV700, ceramic knives HV1100. Therefore, because of high hardness, wear-resisting; wear-resistant capability is 60 times of ... long time use, while the wear-resistant ceramic knives can always maintain the bright color. ceramic paring knife,4" white blade,black ...