PCB etching methods generally fall into ... of the stuff using nothing but a handful of nails and some chemicals you can easily source at a pool store and a pharmacy: Also known as iron (III ...

He can crank out a 6/6 mil double-sided PCB in 45 minutes flat ... established ways of doing this at home, the chemicals are difficult to source. When his local supplier started stocking colloidal ...

found polychlorinated biphenyls (PCBs) and at least one organochlorine pesticide (OCP) and per- or polyfluoroalkyl substance (PFAS) in each of the 108 birds they sampled across four states. The ...