Tape the tracing paper onto the backside of the copper.
Pressing copper sheet.
Place the copper metal sheet upon the work surface front side down.
This will give you the most control over your ability to hammer and indent the copper sheeting.
Draw the design for the copper onto a piece of tracing paper.
The hammer blows need to be deliberate a and focused but not hard.
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Hammering a copper sheet that is hardened can lead to disaster because it becomes more brittle tears or cracks under stress.
You want the copper sheeting to be as flat and flush against the plywood as possible.
This will secure your copper sheeting in place while you are hamming the copper.
Hammer a nail into both ends of the copper sheet and into the plywood.
If an elaborate copper project is underway it will need to be annealed a number of times.