He recently worked out a relatively inexpensive and easy way to etch metals using ... and cleaning the metal work surface, [Peter] sets his work piece in a salt solution. A metal bar is inserted ...

Compounds with metal cations (positively charged species ... and leaving behind copper-free areas on the newborn PCB. The etching solution eventually becomes saturated with copper (II) oxide ...

Restoration of an Antique Rusty Axe // Woodworking, Brass plating & Metal etching. Robert Kraft gives first look at his Super ...