Method of artificially forming patina on copper

摘要

A method of artificially forming patina on a copper product surface comprising the steps of blowing granular sodium hydrogen carbonate powder onto the copper product surface to clean and roughen it; wetting the surface with water; and depositing granular sodium hydrogen carbonate powder onto the wet copper surface; thereby forming patina on the copper surface. The step of wetting the copper surface and the step of depositing granular sodium hydrogen carbonate powder onto the wet copper surface are preferably repeated several times. The copper surface is preferably covered with porous sheets during or after the above steps.