If you were building a recreation of the James Watt micrometer, where would you start? If you’re [rasp], the answer would be: “Spend a year trying to find the best way to make etched brass discs.” Luckily for us, he’s ready to share that information with the rest of the world. While it’s rather unlikely anyone else is working on this specific project, the methods he details for getting museum-quality results on brass are absolutely fascinating.
The process starts with sanding down the bare brass and applying a layer of clear packing tape to the metal. [rasp] then covers the …read more http://pje.fyi/QGnQ9W