Some tips:
- Use a paper towel between the griddle and the metal to keep the metal from slipping around. It won't burn for the temps used.
- Prevent bubbles forming in the paper during the ironing process by running the metal & paper pattern through a laminator several times first then do the griddle & iron method.
- burnishing with the iron is important to ensure adhesion of the toner. The laminator helps but its just not enough adhesion for my etching process.
- If you get it too hot the toner will slip and smear. :-(
- I use the laminator recommended by pcbfx.com from several years ago. Just noticed they have a different recommendation these days.http://www.pcbfx.com/main_site/pages/start_here/laminator_info.html