Re: cyanotype question

From: Dave Soemarko ^lt;[email protected]>
Date: 09/03/04-03:53:40 PM Z
Message-id: <014c01c49200$79a3f4e0$0a808080@wds>

> But, looking at the actual test strips, I don't see this smooth shift in
> tones on both ends. It appears empirically that the lower steps are
> shifting upward faster than the higher Theoretically, that shouldn't
> happen based on the numbers we've both been playing with.

Yes, if that is what you have been saying, then I must have misunderstood
you, and I apologize for that. From what I have read, I thought you meant
that the change in scale is *theoretically* explanable with
densitometry/exposure, but that's not true because theoretically the scale
should be the same except that the whole scale would be shifted up or down.

> Maybe the upper values are just more fragile and are washing away during
> processing so it appears the low steps are creeping up at a faster rate.

Maybe. That's what I meant too when I said that the problem (or the
empirical discrepency) must be attributed to different reasons rather than
to exposure.

Dave S
Received on Sun Sep 5 08:26:45 2004

This archive was generated by hypermail 2.1.8 : 10/01/04-09:17:54 AM Z CST