Reciprocity and intermittency effects in enlarging paper

Previously noted elsewhere, but for those who don't read APUG or
the Pure Silver list ...

There is a new application note on reciprocity and intermittency
effects in enlarging paper on the Darkroom Automation web site.

http://www.darkroomautomation.com/su...ermittency.pdf

The short synopsis is - there aren't any.

--
Nicholas O. Lindan, Cleveland, Ohio
Darkroom Automation: F-Stop Timers, Enlarging Meters
http://www.darkroomautomation.com/index2.htm
n o lindan at ix dot netcom dot com

"Nicholas O. Lindan" wrote in message
m...
Previously noted elsewhere, but for those who don't read APUG or
the Pure Silver list ...

There is a new application note on reciprocity and intermittency
effects in enlarging paper on the Darkroom Automation web site.

http://www.darkroomautomation.com/su...ermittency.pdf

The short synopsis is - there aren't any.

That's a landmark study, for me anyway. I've read in so many places that
multiple exposures will not create the same exposure as the product of the
steps due to latency issues. I believed it. But something else was
happening. I attribute the product difference of many short steps to the
inconsistency of using a Time-O-Lite (which I had marked in F-Stops with
only modest success and some real inconvenience.) But now I have the
Darkroom Automation F-Stop timer. Very cool. Thanks again.