I just heard about this for the first time today from my mom of all people, a method of silk screening based on an old old outdated technology for photocopying called "thermofax". The exposure time is very fast, but does seem to require a particular type machine to do. I wonder if a laminator would do the trick? Here are some links and quotes with relevant information.. This seems to be all the rage among quilters and other fabric artists..
"The key is the unique RISO ScreenMaster mesh [pictured left] which is a ‘lamination’ of polyester mesh and a specially formulated plastic film - pre-coated enabling it to be handled and imaged BEFORE it is put onto a frame for printing without changing/ distorting the design.
By using a simple carbon design, commonly a photocopy or laser print, the fine thermal film [the pre-coated side on the ScreenMaster mesh] is burnt away during the thermal imaging process. The imaging process can be performed on a bench top in any light conditions."
"Here's a list of pens that have enough of a carbon content that they will react with Riso Film:
Pentel Color Pen
Tombow Brush Pen
Itoya Fine Point (non permanent)
Staedtler Pigment Liner
Staedtler 2b pencil
"An alternative to traditional silk screening, Thermofax screens can be made quite easily with images that have been copied using a copier machine. (You need the ink from a copier machine to successfully make the screen.) There are new thermal imagers on the market, or you can buy a refurbished Thermofax machine from Welsh products or go on eBay and bid against tattoo artists who use them for transferring tattoo designs. If you don't want to buy a Thermofax machine but want to have something transferred to a screen, there are also people who will provide that service for you."
Planning to try this method for making plastic sheets out of used grocery bags. Hoping this might be a usable material choice for my springriders project.
Here's an idea I've been wanting to try for making invisible images on plexiglass using short-wave UV light.
(plus a detailed explanation of an imaginary "healing circuit", written by my father way back in 1974.
Experimental HEALING ENERGY PLATE by Howard W. Mitchell.