Until today, I only knew one way to perforate paper (without some mysterious steampunk machine).
(Not everyone knows about these things, so I’ll describe them first. I doubt I’d have heard of them if we didn’t sell them at ye olde art supply store. It’s a mural thing.)
Pounce pads and powder sound rather raised pinky to me. I always figured it sufficed to smash up a bunch of charcoal, wrap it up in cheesecloth, and then slam it against the perforated stencil.
Homemade perforation tool
Basic concept: file grooves into a rotary cutter.
Leave the needle unthreaded and run your paper through it.
Sewing machine (but even better)
Sharpen a tiny brass tube and load that into your sewing machine instead of a needle. The machine will then cut out small circles rather than just poking holes into your paper.
The thing is…these are all fantastic for straight lines. I need curved perforations. I may have to farm this stage out to a high tech laser cutter. Or a die cutter. Apparently my studio mentor knows a guy.