PCB Copper etching using Muriatic Acid ( HCl ) & Hydrogen Peroxide (H2O2) | Without Ferric Chloride - YouTube
Etched my first PCBs using an iron for toner transfer, and muriatic acid with hydrogen peroxide. Neutralized acid with plenty of baking soda afterwards. : r/electronics
Etching PCBs With Vinegar | Hackaday
Etching PCB With HCL and Hydrogen Peroxide : 6 Steps - Instructables