This is Ver 4 of my corrugated dies. My earlier versions had a corrugatiion profile that matched the real thing .. and it didn't work. The aluminum foil springs back about 1/2 way leaving sheets with low corrugated profiles. I doubled the vertical size of the corrugations for this version. That *should* allow proper forming of the aluminum foil.
I removed 0.03mm along the perimeter of one die .. standard foil is 0.016mm thick and heavy duty 0.024mm thick.
Note: These dies are so small it is difficult to hold them while pressing the foil. This is my solution.