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.