Micronics SLS nylon 3D printer makes electronic circuits

A new desktop SLS nylon 3D printer can make printed electronic circuits with the addition of a powdered catalyst and electroless copper plating bath. The printer is available here: https://www.kickstarter.com/projects/... Applied Science video on SLA printed circuits:    • Make plastic printed circuits with a stand...   Favorite copper plating bath recipe: Heat 250ml deionized water to 60*C in a 300ml beaker, stirring at 350 RPM Add 2.5g CuSO4*5H2O, wait until dissolved Add 4.6g EDTA disodium dihydrate, wait until dissolved Add 0.84ml of 1% Triton-X 100 solution in water Dissolve 5.8g NaOH in 30ml DI water, stir until clear, then add to bath Add 4ml Formaldehyde (37% HCHO) Lower stirring to 100 RPM and begin filtration with 0.5 micron syringe filter and peristaltic pump. No intentional oxygenation or bubbling. Filter return is below surface for minimal splashing. I experimented a little with PEG and 2 2' Bipyridine, but didn't find them impactful enough to discuss in this video. LED rectenna designs: https://josepheoff.github.io/posts/1-... https://www.nrl.navy.mil/STEM/LEctenn... Electroless copper references: https://www.nmfrc.org/pdf/p0295g.pdf Copper chromite catalyst: https://www.sigmaaldrich.com/US/en/pr... Possibly available here: https://www.kremer-pigmente.com/en/sh... It's been backordered for a month, so I wasn't able to test it. Open Sauce 2024: https://opensauce.com/ Support Applied Science on Patreon:   / appliedscience