Originally Posted by wret
That looks awesome!
As I understand it, it has to be laser toner, not ink. I'm not sure how the toner forms a "resist" but it does.
I did some research after my post and yes it does have to be a laser printer. Before the paper comes out of a laser printer it passes a heating element that fuses the laser toner to the paper. Using an iron to transfer the printed pattern "melts" the toner which allows it to transfer off the paper and onto whatever you're etching.