Archived posting to the Leica Users Group, 2005/12/01

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Subject: [Leica] Xtol temperature
From: philippe.orlent at pandora.be (Philippe Orlent)
Date: Thu Dec 1 01:27:51 2005
References: <6613D255-682E-4F9F-AB7D-330E1E6E8517@earthlink.net> <a2f8f4470512010014l31066b1m93aa5b52061d586b@mail.gmail.com> <A4F05DFC-A22C-47FA-B9DB-57B7205291BC@earthlink.net>

I will just shoot, not knowing it either, and not being a chemist:
too much chloride, fluoride, other -ide in the tap water that reacts  
with this particular developer?



Op 1-dec-05, om 10:22 heeft feli het volgende geschreven:

>
> On Dec 1, 2005, at 12:14 AM, Daniel Ridings wrote:
>
>> Feli,
>>
>> The average temperature of your water is of no interest at all.
>> What is of interest is the termperature of your developer when you  
>> develop film.
>
> Someone had suggested that the water I was using was too cold,  
> perhaps in the range of 50F. Usually I simply run a few hundred ml  
> from the cold tap and mix it with the developer, which then goes  
> straight in to the tank. I repeated my usual process a few times in  
> the past two days and took a temperature reading. Regardless of the  
> time of day, I am averaging approximately 68F. I've developed a few  
> hundred rolls over the past years with this procedure (using D76 or  
> FA-1027) and have had quite consistent results so far.
>
>>
>> Assuming you are developing at 68 degrees it looks like one of two  
>> things:
>>
>> 1) Your meter is way off
>
> Nope. I checked both of my meters against my M6 and M7. Just  
> recently I compared one of them to a friends meter, which is  
> checked on a regular basis, because he shoots for a living. The  
> sunny 16 rule
> also checks out with all of them.
>
>> 2) Your shutter is way off
>
> I don't believe so. I rotate a mix of M2/M4/M6ttl and M7 cameras.  
> All of them can't be off at once. DAG just checked the shutter on  
> the M7, when he upgraded the finder, and it's dead on.
>
>
>> Possibly 3
>> You haven't told us what a negative "that looks right" looks like.
>
> I don't have a densitometer, but am comparing my results to a few  
> sets of negs (Tri-X@400) I had developed at a local pro lab, which  
> also uses XTOL. In comparison, the negs I am getting from my batch  
> of developer clearly look underdeveloped (the clear base is very  
> dense), when using the 9 min time that Kodak suggests. They are a  
> good match if I boost the processing time to 15 minutes.
>
> At this point I am genuinely stumped. I am out of ideas and will  
> just live with the longer dev. time.
>
>
> Cheers,
>
> Feli
>
>
>
>> Best,
>> Daniel
>
> ________________________________________________________
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> www.elanphotos.com
>
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>
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In reply to: Message from dlridings at gmail.com (Daniel Ridings) ([Leica] Xtol temperature)