"Leon" wrote in message
ups.com...

Eamon Skelton wrote:
On Sat, 27 May 2006 14:28:45 -0700, Leon wrote:

No, I use conventional UV exposure and FeCl3. With artwork printed on
an
inkjet printer I can reliably do 8 mil tracks.

Leon

Do you use the inkjet to print directly on transparent film? Is the
contrast/opacity good enough or do you need to stack two or more sheets?

I print directly on special JetStar film, from Mega Electronics in the
UK. Opacity is fine.


I use a laser printer and OHP film. Even with the toner density set to
maximum, I find I need to use two sheets of film for best results.


I never found OHP film much good when I used a laser printer, I used to
use LaserStar film or tracing paper. The latter is fine for most boards
and very cheap.

Leon


Yes. Tracing paper/greaseproof paper seems distinctly better than clear
film. Bit queer, as I'd have thought the 'frosted-glass' finish would have
dispersed the UV light, much the same way as there still being daylight
after the sun has set. Maybe clear OHP film happily allows UV to bounce
around within the film thickness.

Last week did some quickie SOT23 to DIL adapters. Samsung ML-2250 laser,
600dpi. Single sheet. Very nice results.
john