I have an epoxy resin PCB board, inkjet transparent film, photo resist developer (Natriumhydroxid), and UV box. I printed the circuit layout onto the transparent film and cleaned the PCB's surface.
Can I directly expose the UV light to the cleaned epoxy resin to transfer the layout or do I need to do something before it? I am watching or reading instructions and they all use photopositive PCB. I would very appreciate if someone explain me what steps do I need to apply to epoxy resin? Lastly, when do I apply to photo resist developer?