Rhys Goodwin posted an article in his blog, with a inkjet/toner PCB printer. The idea is as follows: First he put a hot PCB into the inkjet printer and prints the artwork onto the copper side of the PCB. Upon end, he covers the PCB with laser toner. The toner sticks on the wet paint (due to the heat). The excess toner is blown away and the PCB goes cooking. 1.5 minutes inside a toaster, copper-up with 10mm space between the copper and the top lid is enough. This cooks the toner powder into hard plastic. The PCB is ready for etching, and it can stand even Cupric Chloride etchant. Using the same method, he prints the artwork directly on the back side of the the PCB! Watch the videos in his youtube channel, or visit his blog.