I agree, multiple passes are needed.
I run the pcb through the Xerox laminator about 10 times, flipping it each
time. When t is too hot to handle, then I know ti is ready. It is a lot
easer to run it a few extra times to be sure.
Afterwards, I "flash fuse" the toner with a hair dryer to reduce the
granularity and seal the toner better.
The laminators are designed to heat paper, with a very low mass. It takes a
lot more energy to raise to temp of a pcb to the critical point.
Myc
On 7/28/06, Robert Hedan <robert.hedan@...> wrote:
>
> > -----Message d'origine-----
> > De : Homebrew_PCBs@yahoogroups.com
> > [mailto:Homebrew_PCBs@yahoogroups.com] De la part de sethkoster
> > Envoyé : juillet 28 2006 08:57
> > À : Homebrew_PCBs@yahoogroups.com
> > Objet : [Homebrew_PCBs] Re: Still getting broken traces.
> >
> >
> > I think it was a pressure problem. I tested my iron before and the
> > hottest it gets is just under 350F, but the other day when I
> > got my .032" boards and laminator I was able to do a better transfer.
> >
> > The laminator itself does not get hot enough, if I run the
> > board through it the toner doesn't even adhere slightly to
> > the board, but if I iron it to heat it then run it through
> > the laminator and repeat the process a few times I can get a
> > solid looking transfer.
> >
> > But after etching I still find areas where the porosity of
> > the toner creates opens in traces.
> >
> > I think I need some sort of sealant for the toner.
>
>
> I use a GBC H300 laminator and I pass the PCB about 15 times, flipping the
> PCB over each time.
>
> Robert
> :)
>
>
>
>
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