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I have not heard of a water-jet cutter. I will look into that. Thanks!

The foil thickness is 0.001" or 25 um. If I were to use a laser, do you know what type of laser, wavelength, and what laser power would be best?

This is my first post here. I work where we use many small circular aluminum pieces. They have a smaller half circle cut out of one side of it (see attached image). These things are expensive and...