Re: Metol stored June 2000 - Sep 2007
"UC" <uraniumcommittee@yahoo,com > wrote in message
news:1189717238.502212.295400@o80g2000hse.googlegroups,com ...
> On Sep 13, 3:43 pm, Peter <p2macga...@compuserve,com >
> wrote:
>> On Sep 13, 9:29 pm, Lloyd Erlick <Lloyd at @the-wire. dot
>> com> wrote:
>>
>>
>>
>> > September 13, 2007, from Lloyd Erlick,
>>
>> > Today I used some Kodak Metol I bought in
>> > June, 2000. The container was the original in
>> > which it was supplied. Only a few grams of
>> > Metol remained inside. I used seven grams,
>> > and perhaps the same still remain now. The
>> > container is full of air, of course, and I
>> > have certainly never excluded the air by
>> > filling with a relatively inert gas like
>> > nitrogen (which I have available). In fact,
>> > the extent of my effort to prolong the life
>> > of the Metol was to keep the bottle carefully
>> > sealed when not in use. It was in darkness in
>> > a drawer. It never saw storage in the
>> > refrigerator.
>>
>> > Well, if you've read this far, you're
>> > probably not surprised to learn that the dreg
>> > of Metol I dug out of the container made up a
>> > developer that developed sheets of
>> > photographic paper very nicely. I did not
>> > perform scientific tests, or even side by
>> > side comparisons with fresher samples of
>> > Metol, but I can see the print develops
>> > exactly as I would expect.
>>
>> > I don't know how old the Metol was when I
>> > finally got it. I bought it from a shop that
>> > placed an order with Kodak Canada and lo, it
>> > appeared, for about fifty dollars CND
>> > including taxes. Maybe it was manufactured a
>> > year before I got it, so that would be 1999.
>> > Anyway, it's the best part of a decade old
>> > now and hasn't deteriorated.
>>
>> > Great stuff; I think they should find it work
>> > in the data processing industry.
>>
>> > regards,
>> > --le
>> > ________________________________
>> > Lloyd Erlick Portraits, Toronto.
>> > website:www .heylloyd,com
>> > telephone: 416-686-0326
>> > email: portr...@heylloyd,com
>> > ________________________________
>> > --
>>
>> I recently finished off a bottle of Pictol (Metol) that
>> was over 70
>> yrs. old. It was fine.
>
>
>
> Some chemicals are satbler than others. Hydroquinone may
> not so long-
> lived.
Developing agents all absorb oxygen readily. Usually,
but not always, there is some sign of the oxidation.
Hydroquinone changes from white crystals or powder to stuff
that looks like coffee grouds and smells awful. Metol will
turn brown or black. There may have been enough Metol in the
container to absorb all the oxygen without becoming
sufficiently oxidized to change color or become inactive.
--
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@ix,net com,com