[pure-silver] Re: [was] Free Kodak Film - [now] Xtol shel-life

Dana H. Myers a écrit :

Justin F. Knotzke wrote:


On 10/24/06, *Dana H. Myers* <dana.myers@xxxxxxxxx
<mailto:dana.myers@xxxxxxxxx>> wrote:


   However, I'm primarily using 400TMY and Xtol these days.  I'd miss those
   if they went away.


   Leave the XTOL in a bottle long enough and it WILL go away. ;-)

..without notifying you of a forwarding address too I might add.



I've been using Xtol since it came out, something like 10 years,
and I think I had one thin roll of film from a 1L package way
back when.  Xtol reliability hasn't been a problem for me.

Dana

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Neither for me in 8 years of use.
I've a batch mixed the 30th of March 2002, two days after the birth of my daughter.
I've kept the last bottles for longevity tests, last March, it passed the 4 years test successfully, color changed to a pale beer yellow but activity remained visually unchanged.

My current batch was mixed the 6th of January 2005, I developed a couple of HP5 rolls yesterday evening, no problems.

I mix it in demineralized water and keep it in brown glass bottles (pharmacy type), 4x 1-liter bottles and the rest in small 100ml bottles, all stored at room temperature in a closed cupboard.
I develop by rotation, usually with a 1+1 dilution, each small bottle serves as a dose for a 135-36/120/8x10".
I just fill the bottle with tap water when preparing the final working solution.
Once all small bottles are empty, I open a big one and fill the small ones with it.
As they contain slightly more than 100ml, you can't fill 10 small bottles and you waste something, but X-tol is pretty cheap.
All bottles are filled *completely* up to the cap, all I have is a very small air bubble and most often no air at all.
I do not boil the water to outgas it but avoid to insert air when stirring the solution. I mix it at room temperature and check part A is completely dissolved before adding part B.
The general idea is to keep it away from air and light, nothing new, but, as this developer is probably more sensitive than others (and doesn't warn by a radical change of color), we should be more strict on these points.

I've had one 5-liter package (the paper/aluminium/plastic sandwich type) that was roughly manipulated and showed some cracks, I just dumped it. I agree with Richard, this packaging was so-so ...

I've recently applied this storage method to color chemicals (1st developer of Kodak E-6 kit) with a slight change: 200ml bottles are used (= 8x135-36, the maximum I can develop per batch with my Jobo) and, as dilution is critical, I pour exactly 200ml of developer + some demineralized water to fill the bottle completely. When diluting, I just add water to make the final liter to process 8 rolls.
My previous 10 months shelf-life was obtained using the original packaging + butane/propane gaz, I hope to double this shelf-life. Let's see ...

--

Claudio Bonavolta
http://www.bonavolta.ch

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