Portland Oregon sends out a water report every year and also issues warningsi f
they are changing sources: 2021 Drinking Water Quality Report | Portland.gov
<https://www.portland.gov/water/water-quality/2021-drinking-water-quality-report>
On Jul 27, 2021, at 8:58 PM, Ken Hough <k4sb@xxxxxxxxxxxx> wrote:
PH of water? Do any of you call the water department up and ask what the pH
is for that week? In my town we have two water sources one is a leak and the
other is a lime stone aquifer. Both have drastically different pH is right
now for the past few years we’ve been getting water from the lime stone
aquifer and let me tell you it’s a lot different than a lake water. I haven’t
been processing in several years because of my disability but when I was we
had a fairly active community of dark room people in our town. And the
secretary at the water department would find out what the pH was for that
week and post it on her desk shelf. So when somebody would call she would
just tell them. I think it helped that she had a brother who did darkroom
work too
From:
Ken Hough Retired from
Ken Hough Photographic Repair
I Specialized in all Deardorff products
https://web.archive.org/web/20190330122042/http://deardorffcameras.0catch.com/
<https://web.archive.org/web/20190330122042/http://deardorffcameras.0catch.com/>
219-406-6849
On Jul 27, 2021, at 10:46 PM, `Richard Knoppow <dickburk@xxxxxxxxxxxxx
<mailto:dickburk@xxxxxxxxxxxxx>> wrote:
I would have to do some research to remind me of details but it seems to
me that only certain impurities affect photographic solutions. Most
commercial developers contain some sequestering agents for the common
calcium and magnesium in hard water. I think the main thing one wants is for
the water to be clean. Some kinds of dirt don't affect the photographic
results but are deposited on the emulsion. Oxygen in the water can cause
some problems but most developers have an excess of developing agents which
will absorb the oxygen. If you want water without air in it boil it for a
minute or two and let it cool, the boiling will drive off dissolved gases.
As far as the HC-110 with the junk in it absolutely toss it out. I have
no idea what happened to it but being discolored and having stuff floating
in it is not good. Lost the word but means it can spoil, like groceries.
Photographic solutions, especially developers, fall into this class. Like
tomatoes they will last for a while, then get rotten.
On 7/27/2021 8:17 PM, Garry . wrote:
I know many may disagree. But I'll just relay some experiences I had. I
worked at a lab that had a number of different water processing setups.
So I brought some deionized triple filtered water home and used that to mix
developer. The results were terrible.
So I then brought home some reverse osmosis water and mixed some developer.
The results were terrible.
I brought home distilled water that I knew was really distilled and tested
for dissolved solids. The results were good.
I used filtered tap water and mixed developer and it matched the distilled
water results.
Now I'm aware of all the differences between the different purification
methods, and why some may not work as well as others, but I've been using
tap water ever since and I've checked the ppm of the tap water as reported
by the water company and contaminates are all very low. I asked some film
processing companies what water source they used and they all
