Etching Acetal (Delrin) plastic in preparation for painting, gluing, etc https://tube.loping.net/videos/watch/953ca69f-1436-42a4-988c-2498830918d5 I mixed: 40g water 25g potassium dichromate 500g concentrated sulfuric acid http://books.google.com/books?id=Fl57Byhp0ecC&lpg=PA114&ots=wYk-A7i9px&dq=delrin%20etch%20chemical&pg=PA114#v=onepage&q=delrin%20etch%20chemical&f=false I guess this mixture is commonly called chromic acid. Things that I should have done: Use a Pyrex beaker Don't use the magnetic stirrer, just use a teflon stir stick Use an ice bath at the beginning of the procedure Sun, 12 Jul 2026 14:23:36 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://tube.loping.net Etching Acetal (Delrin) plastic in preparation for painting, gluing, etc https://tube.loping.net/lazy-static/avatars/8a56e488-2120-4649-a417-badf5893657b.png https://tube.loping.net/videos/watch/953ca69f-1436-42a4-988c-2498830918d5 All rights reserved, unless otherwise specified in the terms specified at https://tube.loping.net/about and potential licenses granted by each content's rightholder.