... run,discolor,char,peel or crack IntroductionDescription:Talc chalk for engineering and welding Item No.: SP8055Size: 80x5x5 mmMaterial:TalcGrade:First classWhiteness:90 ... welders and fabricators for marking on metals, etc.Use:Mechanical manufacturing, Vehicles manufacturing, ship manufacturing, steel factory, etc Soapstone for engineering and welding ...