Re: long exposures, reciprocity failure and development times

Shannon Stoney wrote:
>
> I have a chart that shows reciprocity failure adjustments for various
> black and white films. This chart also suggests decreasing development
> times as exposure times increase. The reasoning is that reciprocity failure
> affects the shadow areas more than the highlight areas. Is this correct? I
> also have a pinhole time calculator that suggests INCREASING development
> times as exposure times increase. Which is correct? (Excuse the
> cross-posting if you read alt-photo-process and pinhole-discussion.)
>
> --shannon
>
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Hi,

All the charts that I have seen and from from personal
experience, an increase in exposure is always associated with a
proportionate decrease in development time.

Hope this helps.
Bogdan

-- 
__________________________________________________________________
  Bogdan Karasek
  Montréal, Québec            e-mail: bkarasek@videotron.ca
  Canada 
"Wovon man nicht sprechen kann, darüber muss man schweigen" 
"What we cannot speak about we must pass over in silence"
  Ludwig Wittgenstein 
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