Process and apparatus for micro-pattern forming on roll surface, metal sheets for pressworking prepared by the roll, and the method of preparing same

Abstract From the Canadian patent

This invention involves a process and an apparatus for micro-pattern forming on the surface of a rolling roll and a, metallic thin sheet, and the preparation thereof by transferring the micro-pattern on the surface by use of the roll. Such a rolling roll can be obtained by a method wherein a resin film mixed with an optical absorbing agent is formed on the surface a, Q switched YAG laser having an output of 5 to 100 W is applied to make markings on this resin film, a part of the coated film is removed in strict accordance with the pattern and then an etching, process is applied to the roll surface. The metallic sheet skin pass rolled by this roll is used as a car panel which is superior in …