Homebrew PCBs

----- Original Message ----- 
From: "docstein99" <docstein99@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Wednesday, May 02, 2007 6:59 PM
Subject: [Homebrew_PCBs] Toner transfer method - fix for using expensive 
photopaper


>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.

Something similar to that involved dextrin instead of gelatin, I think that 
Pulsar paper was made that way.

Leon