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Subject: Re: [Homebrew_PCBs] Re: Photo-resist etching questions....

From: Leslie Newell <lesnewell@...>
Date: 2007-05-20

It isn't actually a scaling issue. The problem is that the paper expands
and contracts as it goes through a laser printer. This results in rather
unpredictable distortion of the image. Inkjets don't have this problem
because they don't heat the paper.

Les

docstein99 wrote:
> If you bave scaling issues - they will exist with a laser or inkjet
> printer. My inkjet printouts (using corel draw) are so precise, I
> can actually print grids and squares to calibrate my cnc machine. I
> have printed rulers and checked them with my digital calipers, and
> they are by far - very accurate. I dont know what software your
> using to create the images, there are a billion options. Simply in
> corel draw, I can create tiny lines and examine them against a
> precision ruler using a 10x magifying lens - matching dead on.
>
> If it is out of scale for toner transfer, then that same image you
> will use for photo-resisting, will also be out of scale.
>
>