This Metal etching ebook focusing on Copper as your metal and walks you through the process of how to etch designs onto copper for jewelery pieces.
I go over the basics of etching copper from a little about fabricating your own pieces, etching process, cleaning and coloring with different mediums. You also get a resources guide, Printable sheets and a metal gauge and etching time guide! 
 
This is a great resource for you studio and it's a lot of info for a great price as well.