Homebrew PCBs

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