Homebrew PCBs

Hi guys, 

Firstly, for a person brought up on metric, what is a 'mil'??

Secondly, I believe my hp 1022 is also a 1200dpi native resolution 
what sort of minimum trace widths should I really expect to reliably 
obtain?

Third, photo paper consists of good quality paper coated 
in "something". Soaking seems to remove this coating where toner is 
adhered (copper -> toner bond stronger than toner -> coating -> paper)
What would people comment on problems they have observed with photo 
paper TT?

regards, PK

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@...> wrote:
>
> On Tue, 25 Apr 2006 21:39:17 +0200, sm4rzw <sm4rzw@...> wrote:
> 
> >
> >
> > I see... so the paper residue acts as a reinforcement in the 
toner,
> >
> > like fiberglass in epoxy... Yes, the toner itself is rather 
brittle.
> >
> > Acually, I haven't made enough success for etching yet, I just 
wipe
> >
> > it off with aceton and make another test
> >
> 
> 
> It is not really a reinforcement, it seems it thickens up the layer 
in  
> those large areas.
> 
> Thin traces work allright with silicone paper, but 1mm and up 
already  
> causes trouble.
> 
> Maybe with another printer with a heavier toner layer it would be 
better.  
> This one is very see-through even on darkest setting.
> 
> 
> ST
>