Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

I attended a seminar at a computer show hosted by a local college
professor, titled "how to roll your own printed circuit boards".

He was using the toner transfer method with limited success (without
using photopaper). Then goes into explain a 100% reliable method.

Using geletin (found at the supermarket) just plain geletin, used for
making jello. The directions call for "2 cups" of water, he said use
about 8 cups of water. Mix well. Then, brush-on the geletin mix
onto PLAIN pieces of printer paper. Let dry. This will cover the
paper with a very thin layer.

Once the papers are dry they are ready to be printed on. Run them
thru the laser printer. Then iron them to the copper boards. He
says, once the heat of the iron hits the geletin, it will melt and
vaporize. The toner transfers and sticks right to the copper.

He then says the boards have to go into an oven @ 250 (F) for 1
hour. I think he does that so that the toner adheres solid to the
copper board. I think with enough iron-heat and pressure, you dont
need to bake it but I dont know too much about that I havent had that
much experience with toner transfer.