It sounds similar. For wood projects I use 100, then 180, then 220.
sometimes 320 for really fine stuff.
220 is a bit too coarse for substrate prep but its what I had. think
and tinker have a "cleanser/brightener" that I'm thinking of trying.
by the way, that posting took over 2 hours to show up. I thought it
had gotten lost somewhere and, of course, it was one of the few times
didn't save a copy.
Phil
--- In
Homebrew_PCBs@yahoogroups.com, Stefan Trethan
<stefan_trethan@g...> wrote:
> I wonder if the grit is the same in your country as in mine.
> i think it is some "peaks per area" reading so i guess it is
different
> between
> metric and imperial.
>
> Does anyone know that?
>
> I use 600 grit for the pcb prep.
> this is very fine paper, the coarsest you get is 40,
> 60, 80 or 100 being used for common wood sanding.
>
>
> > Copper substrate prep is pretty standard except I use emery cloth
at
> > 220 grit to significanly increase the surface area to improve
toner
> > bonding. I'm going to try something finer than that. wash,
degrease
> > and dry in oven.
> >
>
> Nice results, especially the legend.
> But some pads could be bigger you know....
>
> st