I processed 10 4x5 negatives in 2 liters of D-76 about 3 weeks ago.
There is now a black-ish floculent precipitate in the developer. What
is it, and do I need to filter it out before using it again?
Can I dilute this 1:1, or is that best done with fresh stock?

Has anyone used Express digital Darkroom core edition?
In the description on some sites - it's lists that it has the green screen
functions, as in the trial version.
A rep from express digital said that only Darkroom Pro has the green screen

Is there a simple way to process color negs without investing in a Jobo or
other moderately expensive system? How critical is controlled development
anyway? Cannot shifts in colors be compensated in the enlarger by a turn of
the knob? Or on the scanner with a tweak of the histogram? ...

are there any chemicals that can test fixer exaustion?
i want to start reusing photo-flo and fix.
are there any issues?
thanks

What was so special about this Vivitar VHE 135mm enlarging lens?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7502366083&rd=1&sspagename=ST
RK%3AMEWA%3AIT&rd=1
The reason I ask is that it sold for $52.97.  On the other hand, I won
this Rodagon 135mm for $21.50 yesterday:

Forecast the future of B&W.
Where do you think it will be in:
5 years?
10 years?

Can anyone tell me if it's possible to process Pan-F in Rodinal at
1:100 and still end up with it at iso 50?
All the tables of development either have it at 1:25 or 1:50 for an
end result of iso 50    ,,, or they have it processing in a dilution

I mix D-76 from raw ingredients.  Formulas are always in the spec of 1
litre, but I heard that I can only storage the developer for 2 weeks in
the normal temperature. My question is:
1) I think 1L is too much for me for I only take 2 rolls per month.

Hi all.  I would like to find a foot switch that turns an electric
appliance, such as a light, on and off.  I know they exist because a
floor lamp I have has one.  I want to be able to turn my inspection
light in the darkroom on and off without using my wet hands.  I'd plug

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MONEY MAKER

    What's your favorite cassettes for winding bulk film rolls and
why ?
    I just tried some Kodak Snap Caps and believe me they're not
nearly as good as they used to be. They're virtually impossible to get

Forgive, but I'm an electrics idiot. I would like to make a footswitch for a
Chromegacontrol power supply. The stock number is 461058; four pins in a
circle, one central hole which I think (not sure) is just a locator.
Yes, I know they are commercially available. Spendy things, ...

I am processing Ilford FP4 and HP5 4x5 sheet film. I've processed 10
negatives, and accidentally processed 2 unexposed sheets of the HP5
(400 ASA). I was surprised to find that the film is not perfectly
clear. I'm not sure if what I am seeing is airport (Heathrow) X-ray fog