washing time with alkaline fixing

Questions on fixers for both film and paper

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mska59IT
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Joined: Thu Jun 06, 2019 6:17 am

washing time with alkaline fixing

Post by mska59IT » Sat Jun 08, 2019 7:56 am

Hi, after reading the darkroom coobook I would try to use alkaline fixing. In the book it is said that with this fixing the washing times can be shorter. How much shorter percentage with FB card, eg 25%? Thank you

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sanchell
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Re: washing time with alkaline fixing

Post by sanchell » Sat Jun 08, 2019 11:53 am

With FB paper in alkaline fixer, fix for two minutes, 1 minute in a first bath and 1 minute in a second bath with a 15-second drain between. When the first bath is exhausted I dump it and move the second bath to take its place and mix a fresh second bath. Note that 90% or more of fixing is done in the first bath (100% if the bath is freshly mixed). So the second 1-minute bath is insurance, especially as the 1st bath begins to age.

No HCA after fixing.

Wash in an archival washer (any washer that holds the prints in separate chambers) for 5 minutes. If you are washing in a tray limit yourself to 6-8 FB prints at a time and continuously leaf through them, bringing the bottom print to the top and flip it over once every 15 to 20 seconds. Prints should be kept with their backs facing backs and emulsion facing emulsion. Never wash prints with the emulsion facing the back of another print.

I recommend 10 minutes in a tray.
Do it in the Dark,



Steve Anchell

mska59IT
Posts: 2
Joined: Thu Jun 06, 2019 6:17 am

Re: washing time with alkaline fixing

Post by mska59IT » Sat Jun 08, 2019 1:55 pm

All really clear, many thanks.
Best regards

Mario

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