[rollei_list] Re: Nikor tank: Thing of Beauty
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Wed, 5 Mar 2008 13:05:03 -0800
----- Original Message -----
From: "Eric Goldstein" <egoldste@xxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Wednesday, March 05, 2008 12:05 PM
Subject: [rollei_list] Re: Nikor tank: Thing of Beauty
> Jim, no densitomoeter will compensate for exhausted
> developer.
>
>
> Eric Goldstein
>
> --
>
Well, that depends on how the densitometer is used and
what exactly you mean by compensating. It may be necessary
to compensate for partial exhuation of developer where the
volume is very small. An example is using Microdol-X diluted
1:3, in an 8oz tank for a 36 exposure length of 35mm film.
The small tank time must be extended by about 10% to 15%.
Kodak indicates this in its instructions.
Since the developing time determines the contrast its
possible to find the correct time by sensitometric
measurement.
Of course, this will not allow compensation for some
loss of speed or a change in the characteristic curve,
because simply changing development time does not change
these properties. however, it will let you know if its
happening.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
---
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