At 11:57 PM 1/15/2001 -0500, Tim Hughes wrote:
>garth@xxxxxxxxxxxxxxx writes:
>
><< Washes that are highly effective can be done with four or five changes of
>fresh water, agitated or inverted (preferably the latter) for one minute
>each, with a final rinse in distilled or bottled water and some Photo-Flo (or
>other surface-tension-reducing agent). By the time you're on your fifth
>change, what's left of the chemicals should be close to archivally-small
>quantities.
>>>
>
>If you use acid hardening fixer you may require a bit more washing/more
>changes.
Interestingly enough, many people are abandoning the use of acid hardening
fixer on films. Ilford only recommends the use of such hardeners at processing
temperatures above 86 degrees Fahrenheit (30 degrees Celsius). All of their
new fixer formulations are non-hardening. They offer a separate hardener which
can be added to the fixers. They recommend doubling the washing times in such
cases.
>If you squegee/finger squeegee well you can often get away without distilled
>water for final wash, esp if your local water is not too high in salts.
I'd still use Photo-Flo, Ilford's Ilfotol or some other wetting agent, just to
be on the safe side.
Garth
"Risk management is not a cost, it's a way to make money. If one organization
can manage its risk better than another, then it will be more profitable.
Smart companies embrace risk, look for more of it, and figure out how to do
business in the face of it."
-- Bruce Schneier
Counterpane Internet Security, Inc.
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