So I'm messing around with some new at home PCB fabrication processes. If I've never heard of anybody else doing them, they're new to me that makes me the inventor leave me alone!

Anyways, the etching phase for the normal looking board is just standard ferric chloride etching. This copper that I'm using is pre-sensitized and pretty old, but before I assumed that was the culprit I figured I'd ask if anybody knew if maybe it was due to over-developing or over etching.

And since I'm sure someone will ask the top piece of copper clad is nonsensitized and I coated it with Plasti dip, then ran it through my laser engraver after painstakingly fighting the right power level and speed to cut away the coating but not the copper. It looks super grungy at this stage but after a little brushing with a toothbrush it looks like any other developed copper clad and then into the ferric chloride it goes.

EDIT - Not using an animal to etch the copper, damn you voice dictate.