Stop & Fix in wrong order? on black & white prints

[RobertT]

Hi – I was developing some black & white prints yesterday, (Sat May 26, 1:30 – 5:00 pm) on multi-contrast, resin coated, Agfa paper.

The chemicals I was using called for the paper to be in the following chemicals for the following times:
Developer – 60 secs
Stop - 10 secs
Fix - 30 secs

I do not have further specifics on the developer, stop or fix – I was using the facilities of a club I belong to and the chemicals are mixed for us.

In advertently, I may have interchanged the stop and fix, so that after the paper came out of the developer, I would have placed it in the fix for 10 secs, and then in stop for 30 secs, instead of stop for 10 secs followed by fix for 30 secs.

So far, some 18 hours later, the prints look fine.

How would I know if I processed the paper in the incorrect order (with incorrect times) or not? That is, what would be the symptoms of such incorrect processing?

Thanks very much!

[jstraw]

Assuming that you adequately washed the prints...and those times suggest that you were using RC paper where wash times are short, you're fine.

Basically, you let the fixer stop the development and the stop became a superfluous step.

[MikeK]

I would refix in fresh fixer and wash the prints again. The original fix bath should probably be tossed.

This is a common event in comunal dark rooms - most common effect indicating the fix is contaminated or exhausted is print stains on the print.

Mike

[Monophoto]

Robert -

Stop has two functions. First, it stops development. Fixer will do the same thing.

Second, developer is basic (it's pH is >7), while fixer is acidic (pH<7). Putting prints into acid stop before the fixer causes the pH of the print to become acidic. Then, when the acidic print is then put into the fixer, the fixer can do its job as its manufacturer intended.

But if you move the prints directly from the developer into the fixer, you will carry along some of the basic developer. That developer will, over time, contaminate the fixer.

What that means is that the fixer you were using would have a shorter working life than advertised by its manufacturer. Presumably, since someone else mixes the chemicals in the club darkroom, they will check the fixer and notice the problem before someone else uses it. However, it would be a courtesy for you to tell the darkroom monitor of the problem so that he/she can test the fixer.

The other issue here is that you only fixed your prints for 10 sec rather than the recommended 30 sec. That might be short, and if they were incompletely fixed, the result will be yellow-brown stains that will show up over time (weeks to months). The fact that the fixer was being contaminated with developer at the same time will aggravate that problem.

I suggest going back to the darkroom, soaking your prints in water, and then refixing them in fresh fixer. Then, after washing and drying, they will be fine.

[jmdavis]

As others have said, if you want to keep the prints wet them and then refix.

But I must say that the times you posted (DEV 60 Seconds, STOP 10 seconds, FIX 30 seconds) seem on the short side to begin with even for RC. Actually the stop is ok, but I usually go with 2-4 minutes for developing. I use at least 3 minutes for fix for RC.

[RobertT]

As others have said, if you want to keep the prints wet them and then refix.

But I must say that the times you posted (DEV 60 Seconds, STOP 10 seconds, FIX 30 seconds) seem on the short side to begin with even for RC. Actually the stop is ok, but I usually go with 2-4 minutes for developing. I use at least 3 minutes for fix for RC.

Hi Jim - I'm just a beginner so I cannot comment on the appropriateness of the times. I will say, though, that the guy who looks after the darkroom is very knowledgeable (probably close to guru even) and very conscientous and diligent, so that they should be fine.

Thanks

[RobertT]

Thank you all for taking to the time to reply, and for a special thanks to those who provided extra detail / information.

I am glad I posted this question because I had overlooked the issue of potential contamination of the chemicals.

I have contacted the darkroom monitor to advise him of the situation.

I do not have access to the darkroom so I can not go back there and take the corrective action some have suggested - I guess I''ll just have to take my chances.

Your assistance has been greatly appreciated

Best wishes

Robert

[RobertT]

Hi all - FYI - Forgot to add, wash time (water @ 68 F) was AT LEAST 15 minutes.

Robert

[fhovie]

In one year your prints will start to brown. You need at least a minute in fresh fixer for RC prints and adding acid to them afterwards in the stop will affect long term stability. Go to a pool store and get de-chlorinator - it is sodium thiosulfate - mix up some in water and soak your prints for a minute or two - then wash for 10 minutes and rest easy - they will be fine.

[dancqu]

Go to a pool store and get de-chlorinator - it is sodium thiosulfate -

Maybe. I've read posts saying it is a sulfite. Dan