LauraLou, when I've used ink as a resist, heat-setting the ink (with a blowdryer
since I didn't have a heat gun) made a big difference in terms of staying power. Also have had the best luck with the red Staedtler Lumocolor pens that are recommended in the protocol Karen Christians wrote (
http://www.ganoksin.com/borisat/nena...nsfer_etch.htm)
and with StazOn ink. This is with a chemical bath though, over several hours.