Schmutz in my XTOL

[Ian Grant]

Topping up - where the volume is kept constant by adding replenisher as needed.

Bleed - where some developer is removed and a larger volume of replenisher added to restore the volume.

Some developers are prone to Bromide build up and so require bleed replenishment to keep this under control, but choice of film has an effect as well - Tmax can tolerate higher levels of Bromide in the developer as well as Iodide.

At it's optimum Ilford tested their PQ F.G.F developer Autophen (A PQ variant of D76) and with Topping up replenishment found that results were consistent for 65,000 rolls of film in a 24 gallon (UK) processing line, thats 595 rolls per litre !!!!

There's maths equations for the exhaustion of the developing agents, bromide& iodide build up and rates of replenishment needed.

Ian

 

[markbarendt]

That is a bunch of rolls!

A new thing to play with, thanks.

 

[Christiaan Phleger]

Wow Ian, that's really enlightening. Mine are less than Kodak but more than yours, I think I could perhaps start to experiment and try to get close to yours. Is there a method that you use for establishing that rate?, just an overview. I've been doing Xtol replenished for 4-5 years and if I could get it down to 25ml that would be great.

 

[Rick A]

My buddy used Efferdent to clean his b**g to rid it of tar and other residue. Its a no effort clean out, whatever is in the stuff boils the gunk outta everything.

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To clean his b++g? blog? or what? I may have tar in the b..g and not know it! Help me out here, Rain. :confused:[/QUOTE]
Okay, AJ --he cleans his bong with it. He claims he needs his stuff for medical reasons, but I can remember when he didn't have physical maladies, but he is diagnosed with MS (found out about 10 years ago) and living in Oregon, gets to keep his "personal use" stash out in the open. Personally, I've no use for that crap. I stay dopey enough on the arthritis meds, and I hate to be groggy(good reason why I dont drink alcohol either).