Homebrew PCBs

On Sat, 28 Feb 2004 22:32:26 -0000, Phil <phil1960us@...> wrote:

> please help me understand why 600 is so good.  I'm not disputing it,
> mind you but it seems kind of at the edge.  If I am doing the math
> correctly, a 10 mil trace on a 600 DPI device is 6 dots wide.  8 mil
> is less than 5 dots.  That seems kind of tight to me but maybe its
> ok.  With my ink jet (1440 dpi) and copier (not sure what its
> effective DPI is but its pretty high), I get really clean traces even
> at 8 mil. I can get them to transfer but am fighting smearing which I
> believe to be due to poor temperature control.
>

Well, i did not do any maths...
i just make ok boards with 10mil traces with a 300dpi printer.
even the 45degree are not bad but just a slight bit more resolution would 
be perfect.
so i guessed 600dpi must be very ok then..


no doubt, 1200 will be even better, but would maybe not be worth double 
the money
in my opinion.

the second transfer blurs the image a bit, so the dots would be no doubt
more visible when direct printing.
i think 300dpi is just about the quality limit i get with paper toner 
transfer.
more dpi would not improove the result noticeably because more distortion
comes from the transfer.

600 is not so good, it is just the lower limit i assumed.
and lower dpi means older, and thus cheaper (especially the toner).

ST