you may try kicad, it have option to mirror and ploting negative..
--- On Thu, 8/20/09, pr0pert <propert@...> wrote:
From: pr0pert <propert@...>
Subject: [Homebrew_PCBs] Re: Making negatives
To: Homebrew_PCBs@yahoogroups.com
Date: Thursday, August 20, 2009, 2:06 PM
--- In Homebrew_PCBs@ yahoogroups. com, DJ Delorie <dj@...> wrote:
>
>
> "leon Heller" <leon355@... > writes:
> > DJ reckons they are about the same. I have to use the more expensive
> > JetStar Premium with my HP 5940, the ordinary stuff was OK with the
> > Epson printer I used to use.
>
> IIRC the difference is that premium supports both ink and pigment, the
> other only supports one. My printer happens to be the type that they
> both support, so I see no difference.
>
OK I've ordered some Silkjet media and I'm ready to try this, but I
may have gotten ahead of myself. It seems all the PCB editors
output positive prints. How are you getting a negative print to be
able to use a negative process resist? Is there a way of doing this
with a gerber file? Hidden options for printing? turning the printer
upside down ;)?
[Non-text portions of this message have been removed]