[pure-silver] Re: large format photography books
- From: `Richard Knoppow <dickburk@xxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 25 Apr 2019 17:16:45 -0700
On 4/25/2019 5:08 PM, `Richard Knoppow wrote:
l plastic ones.
The plastic ones seem to be pretty air tight. Again, for most
(but all)
^^^^^^ should read but NOT all. Some developers and fixers do
NOT discolor although they may lose activity.
A clip test is the best method to be sure. Just a small bit
of exposed film. If it does not begin to turn black in the
developer within maybe a minute, its no good.
Fixing baths should begin to clear undeveloped film in a
minute or so and clear it in about three to five minutes for
Sodium thiosulfate fixer or about one minute for ammonium
thiosulfate (rapid) fixer at working strength.
For dumping solutions I meant to a regular city sewer system.
If you have a septic tank or something similar check first. Some
solutions are OK some are not because they will kill the
microorganisms that make the system work.
developers the color is a good clue as to its condition.
--
Richard Knoppow
dickburk@xxxxxxxxxxxxx
WB6KBL
=============================================================================================================
To unsubscribe from this list, go to www.freelists.org and logon to your
account (the same e-mail address and password you set-up when you subscribed,)
and unsubscribe from there.
Other related posts: