: Typically 15N20 , which adds toughness and resists acid, resulting in bright, shiny silver lines .
The process begins by choosing two or more types of steel with different properties that will react uniquely to acid etching : making damascus steel.7z
: Commonly 1080 or 1095 , which provides hardness and a dark gray or black tone when etched . : Typically 15N20 , which adds toughness and