Yup, Red pens work better, and for some reason don't etch off in ferric
chloride.  Skips can also be from a dry pen or a pen not at the right height
versus the paper.  The cardboard trick works, try it.



-----Original Message-----
From: VINCENT COPPOLA <vinyc@snet.net>
To: lilel@toastmaster.com <lilel@toastmaster.com>
Date: Monday, May 17, 1999 8:32 AM
Subject: hp7475 PC board plotting


>I have tried to plot to a PC board directly using the Staedler 313 Pen,
>but it was a BLACK one. Is there something special about the RED? I do
>get dropouts with the BLACK. Not sure what the cause is.
>
>Also have not tried the cardboard under the paper trick yet.
>
>thanks for reading,
>Vince N1VC