I have another suggestion for an etching resist, but it does use a
laminator/heat to use. Toner Transfer System - from Pulsar - it was
originally created for Circuit boards I think. There are 2 steps, one
transfers toner from a laser printer and the other step seals the
toner for a stronger resist to the acid - I like it much more than
PNP. There’s also another resist that is called ImageOn by Dupont.
For this resist you use UV light to develop the resist and then wash
away the undeveloped parts to etch.
There was a youtube video on how to use it, but I don’t know if it’s
still there. This method it used in the printing biz for Intaglio
printing. I found this site that discusses other resists like
ImageOn: http://www.ganoksin.com/gnkurl/1eb Another way to do
etching resists is to use a C02 laser - not something that most
people have in their homes (do to expense), but there are tons of
businesses that have them, especially in the trophy industry. You
can paint asphaultum, nail polish, enamel paint or packing tape on
the surface of your metal.
Use a Rastor/JPG Black and white image for the laser and it engraves
away the resist where you want the acid to etch. It works
beautifully! You can get crisp tiny details with it. I happen to have
a C02 laser for my new business and have used it to prep for etching
- it’s amazing. If you’d like more info on the process, you can
contact me through my personal email.
Ellen StarrStarr Design