TRF film is like the press and peel system that you can buy for
manufacturing PCB's. Pulsar in the states sell rolls of it.
What it actually does is when iron onto toner it leaves an extra
coating on platic behind which fuses to the toner. It should
thierfore blocking the pinholes left in the toner. Thats if you have
problems with pinholes. I am trying to produce very large PCB's with
the toner transfere method theirfore no matter what paper I use I
usally get a spot or two were the acid can get thru.
TRF just as a note is not a new invention it been around int the
printing industry for decades to put coloured letter heads on and
holgraphs on certicates etc.
--- In
Homebrew_PCBs@yahoogroups.com, "Helge Kyndbo" <kyndbo@...>
wrote:
>
> Hi,
> I would like to understand what is "toner sensitive film".
> please show some light on this.
> thanks Helge
>
> 2008/1/16, peripherin <peripherin@...>:
> >
> > Well The good news is it works and it works really really well The
> > toner is rock hard and fused to the board I have found that
slowing
> > the motro to helps as the board absorbs a lot of heat as it passes
> > thru the laminator. I found that 220Deg C works well for the feed
> > rate of my laminator. I am awaiting a roll of toner sensitive
film to
> > arrive as I believe this will stop any bleed thru problems I have
> > been getting on the larger boards.
> >
> > --- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
> > <stefan_trethan@> wrote:
> > >
> > > It is easy to figure out, pull the fuser unit, attach some slow
> > drive
> > > motor of your choice, attach a thermostat, preferrably
electronic
> > not
> > > electromechanic, and you are all set.
> > > There is a thermistor already in place on all fuser units i have
> > ever
> > > seen, they have already figured out how to keep it in contact
with
> > the
> > > rotating roller for you. In can be used as an input for a
> > thermostat,
> > > mine is just a plain npn transistor, a pot, a transformer and a
> > solid
> > > state relay i had sitting around. Might not be terribly
accurate or
> > > pretty (i hid it in a junction box) but more than enough to do
what
> > is
> > > required.
> > >
> > > ST
> > >
> > > On Jan 15, 2008 6:39 PM, peripherin <peripherin@> wrote:
> > > > I have ordered a selection of thermostats from Radio Spares.
I did
> > > > not know which temperature would work best with the HP toner
but
> > > > guessing points me to around 200deg C. I will modify the
laminator
> > > > when they arrive. If it does not work then no loss old laser
> > printers
> > > > are easy to come buy and strip apart.
> > > > Does anyone know of any good threads or sites for laser
printers
> > that
> > > > have been modified to do this ?
> > > > Just as a note I am in no way responsible for people who
decide to
> > > > carry out this modfication. You do so at your own risk.
> > >
> >
> >
> >
> >
> > Be sure to visit the group home and check for new Links, Files,
and
> > Photos:
> > http://groups.yahoo.com/group/Homebrew_PCBs
> > Yahoo! Groups Links
> >
> >
> >
> >
>
>
> [Non-text portions of this message have been removed]
>