Homebrew PCBs

Tom Keys wrote:

>   I've read somewhere that people don't like using laser printers for
> making their artwork, when using photoresist.
>   Is the reason for this that the toner is not dark enough?
>   I'm asking, becaused something came to my mind.  You can buy foil
> transfer for laser printers and copiers, for as low as us$15 for 8"x100'.
>   I can't see foil itself being transparant to light in any way.  Has
> anyone ever tried this?  Print the artwork onto a transparancy, then
> transfer the foil onto the toner, should give you 100% opaque artwork
> for the photo transfer.
> 

I've never personally seen this transfer foil. Once the foil has been 
transfered, is the remaining foil just a negative of the image ? Maybe 
it is possible to use the foil paper as a negative photomask after doing 
the transfer. Just a thought.

Adam