Originally Posted by heckels
Any issues with the rubber part of the cap melting/deforming?
Yes, a little during my experiments. My main problem was smearing of the toner - I think when the cap gets hot enough to melt the toner, it stays hot a while, which gives the opportunity for smearing. In my next attempt I think I'll try putting the caps on a wet washcloth as something of a heat sink.
But I think for proof of concept, it was a success. I'm hoping some of the rest of you will try it and between all of us we might find a way to make it a little more reliable and less labor-intensive.