Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, Kamal Shankar 
<kbshankar2000@...> wrote:
>
> Hi
> 
> What's the method to find out the track width (in
> mils) that a laser printer can print reliably from
> it's resolution in dpi ?
> 
> Stefan told me that a 600dpi can di upto 2mil ?
> 
> I forgot to ask him how he did that ?
> 
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My guess, ( the way I  calculate it ) would be 
 
1 inch  divided by the DPI (Dots Per Inch),  then round off

i.e.   1 
      / 600
    -----------
    0.0016666666666666666666666666666667
rounded to 0.002

contrary to what is implied in the term "mil",
1 mil = 0.001 inch

This might not be the way Stefan works his 
calculations