[pure-silver] Re: Phototec times for Tri-x and Tmax 100

Elias there is one thing to consider.  What you say would be true if the film 
was the same in 120 and 35mm.  Sometimes though the film name is the same, the 
film speed is the same, but the actual emulsion is different which may require 
some slightly different processing.  Sheet film may be different still.

The development times of the manufacturer are a good place to start, then 
refinement can be made based on ones experience.


--- On Tue, 8/26/08, ERoustom <eroustom@xxxxxxxxxxx> wrote:

> From: ERoustom <eroustom@xxxxxxxxxxx>
> Subject: [pure-silver] Re: Phototec times for Tri-x and Tmax 100
> To: pure-silver@xxxxxxxxxxxxx
> Date: Tuesday, August 26, 2008, 8:51 AM
> Hi Janet,
> 
> There's no need to develop 120 film any longer than 135
> film is  
> there? A 36 exp. roll of 135 film has about the same
> surface area as  
> a 12 exp. roll of 120. They get same the treatment - or
> have I  
> misunderstood something along the way?
> 
> The best proof of whether you're developing your film
> properly is in  
> the printing process. Given, your exposures are correct, if
> you have  
> trouble controlling highlights, you're over developing,
> if you're  
> having trouble achieving adequate contrast, you're
> under-developing.  
> If every film is different, you're not being consistent
> in your  
> routine, or not being able to control the variables (time,
> temp,  
> agitation, chemical freshness, etc.).
> 
> I've read elsewhere that developing a consistent
> approach to the  
> making of contact sheets is the best way to learn
> what's happening in  
> film processing, and allows comparison from roll to roll.
> 
> Carving out the time to get better and better at doing all
> this gets  
> harder and harder, but it sure is fun.
> 
> I'm encouraged to hear that you started a club.
> I've been toying with  
> the idea of approaching the local high school and seeing if
> they're  
> interested in having one for their students.
> How's your club doing, how often to do you meet, where,
> etc. I'm  
> interested in learning more about if you'd like to
> share.
> 
> Elias
> 
> 
> 
> On Aug 26, 2008, at 9:19 AM, Janet Cull wrote:
> 
> >
> > On Aug 26, 2008, at 3:08 AM, mail1 wrote:
> >
> >> I have rarely found list times correct, although
> they will get you  
> >> started
> >> in the right direction.
> >
> >
> > I don't know how to adjust times according to what
> I see,  
> > minutely.  Of course I'd know if it's badly
> overdeveloped (which  
> > I've done) or badly underdeveloped (which I've
> also done), but if  
> > it's close I haven't a clue.  (I even started
> a little film club  
> > here, hoping there would be darkroom people with more
> experience,  
> > so I could learn hands-on.  I'd love someone to
> hold my negatives  
> > and tell me specifics.  Unfortunately, there's
> only one young man  
> > who has done some darkroom time.)
> >
> > I routinely need to give more development time to my
> 120 film, but  
> > 35mm is usually right on... as far as I can tell.
> >
> >


      
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