FotoDave@aol.com
Date: 09/17/02-07:22:25 AM Z
In a message dated 9/17/2002 8:17:02 AM Eastern Daylight Time,
sstoney@pdq.net writes:
> If you use another
> sheet of Tri X for the positive, it will be very fast, so the
> exposure will have to be very fast. If you are exposing with a 7 1/2
> watt lightbulb, I think it would be hard to get the exposure short
> enough. Am I correct to worry about this?
>
Shannon,
You can use filters to cut down the light. I have used T-Max for color
separation positives. You can use neutral density filters or combination of
color-correction filters (they don't really have to be neutral as your
original is b&w).
Or you can use lith film and LC-1 developer, dilution 2:3:5. That will be
cheaper, but you get the *opposite* problem, that is, the speed will be slow
and exposure will be long, but for 8x10 contact printing, it should be fine.
A few people are using LC-1 for photogravure, but I can't remember who.
Your enlarged positives, unlike digital ones, don't have the dots needed in
photogravure, so you will need to expose it to a random-dot screen, but of
course you knew that....
Dave S
This archive was generated by hypermail 2.1.5 : 10/01/02-03:47:09 PM Z CST