... ,Hygiene,hard and sharp; 3.No rusted and discoloration; 4. white Ceramic knife 5,LFGB,EU,SGSCeramic Knife – High Density ZirconiaItem ... the properties as sharp-edged, wearable, rust proofed, Health and Environmental Protection. They can endure erosion of all kinds of ... acid & alkaline organic substances; keep food original color and flavor, enjoy the gourmet flavor! High quality ceramic kitchen knife