When I first got into making pinholes I started with aluminum and the ol'Coke can, etc, only to have difficulty when getting a nice "thin" and round hole at and around .5mm. I then read some ancient article from the 19th century that described using "brass". So, I bought a sheet of very thin brass from our local Hobby Lobby craft store and went to town making pinholes. Brass was definitely the ticket for me. Thin brass can also be cut easily with scissors to create brass pinhole plates for insertion into shutters or homemade holders. "Thin" is also important because your really don't want a pinhole that looks like a "tube" through a thick plate. You can also pound (aka flatten) brass in order to make it thinner, as needed. The aluminum that I've tried to use had a tendency to crack and fracture when stressed.
I wish you the best in your venture.
Last edited by DannL.; 10-31-2013 at 12:29 PM. Click to view previous post history.