10 PCB Circuit Board Thermal Transfer Paper A4 size Transfer Paper DIY Circuit Board Special Paper Size: A4 / Color: Yellow / Quantity: 10(Please do not because of lack of experience, blame the thickness of the paper.Very sad) 1 with a laser printer to print circuit board wiring diagram of the heat transfer paper surface(Note: can only be printed with a laser printer can not use inkjet printer!) 2 with a laminator adjusted to between 150-180 degrees Celsius, the heat transfer paper printed with a circuit diagram deposited in the copper-clad side for transfer; the system can also be used in place of iron plate machine, hand transfer 3 After printing remove the transfer paper, CCL will be etched into the ferric chloride solution 4 Finally, cleaning with gasoline toner board, sanding paper or water in the water to flush out carbon(For more success stories please check customer reviews)