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/support/appnotereciprocityandintermittency.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" <see@sig.com> wrote in message
news:vL2dnaPdWcGUm4DVnZ2dnUVZ_quhnZ2d@earthlink.com...
> 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/support/appnotereciprocityandintermittency.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.