You simply make the PCB image by putting a Press 'n' Peel sheet of transfer film in the paper tray of a photocopier or Laser Printer (The sheet size is almost the same as the A4 paper tray). You then print or copy the PCB track image onto the film. Using a domestic clothes iron you press the image onto a precleaned piece of copper clad PCB. The image transfers to the copper and the image will not etch away. Ammonium Persulphate or Ferric Chloride are both OK.You get 5 sheets of 215 x 280mm transfer film in each pack.Full instructions supplied.4 Easy steps1. Print or Copy2. Iron on3. Peel off4. Etch