Hi David, I have been down the same road making negs from artwork. The only
thing left that I know of and I have been using for a while now is what
appears to be the only thing being made is a German Lith film by the name of
MACO GENIUSfilm which is Litho film coated on a clear and stable 100u
polyester base.(Description on the packet of film) it is processed the same
way as Kodak Kodalith Ortho used to be.
I get mine from a art supply house in Melbourne, Brunswick I think but I
will see if I can find out where, its a while since I bought any.
For developing I use Koalith super RT developer A&B
CAT....445 6794.
For fixing I use ILFORD ILFOFIX II...CAT.1756948
Hope this helps.
73's Don VK3YV.....
----- Original Message -----
From: "David Hopkins" <davhop@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Saturday, October 11, 2008 1:32 PM
Subject: [Homebrew_PCBs] Reversing film.
> Gentlemen,
> For over thirty years I have been making PCB boards using a
> photographic method.
>
> The pre coated board I have been using is -ve acting.
>
> This requires a negative to be produced from the +ve computer
> generated artwork. For many years I used an orange (UV opaque)
> material made by 3M.
>
> This was taken off the market and I switched to an AGFA
> Printon Ortho daylight film. This was far superior than the orange
> film however the section of AGFA that made this film went out of
> business a couple of years ago.
>
> Try as I might I can't find a replacement for this film.
>
> What I need is a method that can make a high contrast UV opaque
> negative from a positive printed on cleat plastic.
>
> Anyone have any suggestons?
>
> Thanks
>
> David
>
>
> David G. Hopkins (Vk4ZF)
> CAPALABA QLD.
> AUSTRALIA
> S27 32.191 E153 11.867
>
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and
> Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>
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