Homebrew PCBs

----- Original Message ----- 
From: "Stephen Bartlett" <tower.op@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Thursday, January 06, 2005 2:47 AM
Subject: [Homebrew_PCBs] Questionable Toner Transfer Results


> 
> I just made a test ironing of a toner pattern to a copper board, with
> very unsuccessful results.
> 
> I cleaned the board with a new Scotchbrite type pad and detergent, then
> scrubbed it with naptha (Ronson lighter fluid) before trying to iron the
> image.
> 
> The image was printed in black on Staples Photo Paper, using a Xerox
> color printer at the local Staples store.  Even though the printer was
> set for maximum darkness, there was no noticable "thickness" to the
> black areas on the Photo Paper copy.  Should there be?
> 
> The image and paper never actually stuck to the copper board, except for
> one small spot. 
> 
> The board was hot, hot enough to begin scorching the paper, from the
> look of it.  I used a 1200 watt iron set on Linen (hottest setting) for
> several minutes.  While I got some image transfer to the copper, it was
> not very heavy, and was not resistant to light finger rubbing.
> 
> I tried a second transfer, also cleaning the bare board with 600 grit
> wet sandpaper.  The result was another partial transfer of the image
> _pattern_, but it was not dense enough to be called a resist layer. 
> Again, the paper and image areas did not even begin to stick to the
> copper surface.  The paper remained completely loose on the board.
> 
> Obviously I need to do something differently; should I start by trying a
> different printer?

It might be the printer/toner. HP LaserJets always work well for TT.

Leon


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