Here is a soldering tip from @mi.chi.mi - “I use dirty pieces of metal as heat sinks to protect previous soldered joins. Since they’re so dirty I don’t worry that they’ll get soldered to my piece. I’ve used these copper pieces for over a year now with good results.” Thank you so much for sharing this with us! I am ALWAYS looking for soldering tips, they are so helpful! If you have a soldering tip shoot me an email with a quick video or a picture please! Tips@metalsmithsociety.com I really appreciate it! #solderingjewelry #solderingtips #soldering #heatsink