That was reserved for Gutenberg. As an experienced metalworker, he grasped that printing could best be achieved with movable letters made of, not pottery or wood, but metal. They would be cast in a mold, not carved or baked in an oven.
કોરિયામાં, સરકારી છાપકામ માટે તાંબામાંથી બનાવેલા અક્ષરોનો ઉપયોગ કરવામાં આવતો હતો.