[pure-silver] Re: Zone Data Project

  • From: "Ralph W. Lambrecht" <info@xxxxxxxxxxxxxxxx>
  • To: PureSilverNew <pure-silver@xxxxxxxxxxxxx>
  • Date: Fri, 22 Sep 2006 22:45:08 +0200

N+ and N- are pretty well defined. What do you mean with 'fluid'?





Regards



Ralph W. Lambrecht

http://www.darkroomagic.com







On 2006-09-22 22:33, "Jim MacKenzie" <jim@xxxxxxxxxxx> wrote:

> 
> ----- Original Message -----
> From: <rgacpa@xxxxxxxxxxx>
> To: <pure-silver@xxxxxxxxxxxxx>
> Sent: Friday, September 22, 2006 2:15 PM
> Subject: [pure-silver] Re: Zone Data Project
> 
> 
>> My review of the massive dev chart is that it doesn't contain N+ or N-
>> information. My shallow understanding of the zone method is that both ASA
>> and dev times usually change to achieve expansion or compression.
>> Perhaps I've missed something on the massive dev chart site that contains
>> this info?
> 
> There probably are charts that have information like this, but generally, N+
> and N- development times, as well as N, have to be determined by testing a
> given film with your technique and metering habits, as well as your own
> equipment.  The very definition of N+ and N- is pretty fluid so you need to
> establish what these mean to you so that you can figure out what appropriate
> development modifications to make to achieve the results you want.
> 
> Jim 
> 
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