Odp: [sdiy] PCB making: how to get a transparent foil with real black lines?

[Roman Sowa]

You can use what some PCB fabs use - graphics outsourcing.
Over here we have lots of places where you can order any
postscript graphics to be printed on transparent foil with
1200-3000 dpi
Newspapers use this service to make photo masks for their
press. So try asking at newspaper where do they print
and you done.
Oh, it's really cheap service, and it's real black on crystal
clear transparent. I mean black like in miner's ass during
power-off breakdown while he drinks coffe.

Roman

----- Original Message -----
From: Czech Martin <Martin.Czech at Micronas.com>
To: synth diy <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, February 05, 2003 10:14 AM
Subject: [sdiy] PCB making: how to get a transparent foil with real black lines?


> I'm considering to buy an etching machine as well as UV light source.
> It's a bundle, some saving.
> I remember that 20 years ago, when I made my first PCBs,
> the transparent foil was the issue. Or really: the black
> areas on it. Because I couldn't manage to make them really
> black, so there was some light comming through and this made the photo
> process very instable.
>
> Now, 20 years later there are things like ink-jet printers,
> or laser printers, but my experiment showed that at least the HP870
> ink-jet couldn't make really black lines. So much for that.
>
>
> Is there someone out there how can propose a better method
> to get a layout on film?
>
>
> You may ask "why not using a comercial service?".
> Well, I think they take EUR 40 - 50 for a single sided,
> 160x100 mm^2 PCB, that's about 4 times what the materials
> cost! The PCBs would in this case determine system cost.
>
> m.c.
>