[Ben Krasnow] milled some lenses out of cast acrylic as well as needed a method to get an optical surface on the tool-marked surface. He checked a number of acrylic completing methods to accomplish a crystal remove finish. The tests were done utilizing flat chunks. A program of sandpaper, from coarse to fine, was utilized as the very first stage of the operation. From there [Ben] sought out the very best completing step, starting with hand polishing tests, flame polishing, as well as methylene chloride vapor polishing (which is something along the lines of acetone vapor polishing for 3D printed ABS parts).
Flame polishing as well as vapor polishing are not truly precise sciences… at least in the tests he performed. It was tough to understand precisely exactly how long to subject the acrylic. as well short or as well long resulted in bad clarity. enjoy his video to get a look in any way results. We’d state the the simplest method to make milled acrylic clear without achieving an optical surface is to flame polish it as it doesn’t truly need that you sand it ahead of time. however [Ben’s] tests verify that you can’t beat hand polishing with 600 then 2000 grit sandpaper before completing up with a liquid plastic polish.