Photoprocesses

• Presensitized boards
• GC Chemicals PES spray
• Riston lamination film

Physical resists

• Toner transfer with laser printer or copier- some printers won't work
• Paint and burn off with the laser

Materials

• PCBs are the primary need
• Copper, brass for artistic purposes
• Marble - dissolves in Hydrochloric Acid (HCl)
• Aluminum - very exothermic, prone to thermal runaway
• Steel - Generally, must be electrically etched away. Beware: Stainless steel puts toxic chromium into the electrolyte.