Homebrew PCBs

this sounds more like using the fuser in the LP to do the toner 
transfer.

--- In Homebrew_PCBs@yahoogroups.com, "Jan Kok" <kok@s...> wrote:
> I recall seeing an article about printing directly onto thin copper
> sheets using ordinary laser printers.  This was in some popular
> (British? or American) electronics hobby magazine around 1994.  
There is
> some sort of copper sheet with plastic backing that could be 
obtained
> for $100 (maybe much less, my memory is fuzzy) for 10 sheets or 
so.  The
> sheets could be printed, etched, drilled and used.
> 
> The article mentioned printing your pattern on a regular sheet of 
paper,
> then cutting out a piece of the copper sheet, taping it over the 
printed
> pattern on the paper (copper side facing out :-), and running it 
through
> the printer again so that the pattern is printed onto the copper 
sheet.
> 
> I remember thinking, "I won't do that with MY laser printer!"  But 
it
> occurs to me now, that if all four edges of the copper are flat and
> covered with tape, it should be reasonably safe for the printer.
> 
> There is a kind of cellophane tape used by people who work with
> photographic film (for example printing shops).  The tape is thinner
> than most tape, adheres strongly, and tends to not leave adhesive 
behind
> when removed.  That might be a good tape to use for taping copper 
sheets
> to paper for laser printing.
> 
> There has been discussion in other threads about whether printing
> directly to copper in a laser printer can work, given that copper is
> conductive.  I don't know why it apparently works, but maybe it has 
to
> do with the paper or plastic insulating backing.
> 
> Cheers,
> - Jan