I make my own stamping tool for my silver jewelry that is made from silver clay and I love using PNP paper for my process. I have tried another method and it was just a mess. I use precut 1 1/2" copper plates. I sand with 500-600 grit sandpaper and wipe it clean with rubbing alcohol. I have the Rowenta Focus iron that does not have the auto shut off. I put the setting exactly on the cotton-right in the middle. I have a HP laser jet printer-nothing fancy. I just make sure to bump up the toner settings and I make sure to bump up the black and white settings in Photoshop when I create my images. Once I print the image on the PNP, I cut the image out and lay it over the copper plate. I put a paper towel over the top and put my iron over it for 5-10 minutes, depending on the complexity of my design. I then put the copper plate in water to quench it. I slowly peal off the PNP paper. I rarely have any issues. Sometimes I get a small portion of black area missing and that could be any number of things, not necessarily the PNP paper. I just fix those areas with black nail polish and a paint brush with trimmed bristles. Then I just etch the copper plate with Ferric Chloride. Very easy to use and I get consistent results each time.