% Adjustment for Seasoned XTol?

[NortheastPhotographic]

Is there a standard % adjustment in time for using seasoned XTol, as compared to stock? Kodak doesn't have all films in their PDF and I'd like a point of reference. For example, I'll be processing some Fomapan 400 tomorrow.

I run film at 70˚F in a Jobo CPE2.

Thanks!

 

[MattKing]

You could use the data on the tables on pages 8-10 of j109 to see if there is a consistent ratio between the "full strength" times and "seasoned" times for rotary tube development of various films.

 

[Sirius Glass]

+1 use the data sheets. I have only had to make small adjustment for one film from the data sheets.

 

[NortheastPhotographic]

Hmmm the data sheet percentage changes are not consistent between films. I should compare it to 1:1 times maybe...

 

[Sirius Glass]

35mm, 120, and 4"x5" are different thicknesses and thus different times. The data sheets are based on testing and there is only one film that I had to develop a little longer.

 

[NortheastPhotographic]

35mm, 120, and 4"x5" are different thicknesses and thus different times. The data sheets are based on testing and there is only one film that I had to develop a little longer.

Not different as in formats, different as in there is a different percentage change between Tri-X Stock & Seasoned and HP5 stock and seasoned. 15% vs about 20%.

 

[bdial]

I've not been using seasoned xtol for a bit, but as I recall, the times all seem to be very close to the 1:1 times, so I think that would be a good starting point.

 

[John Wiegerink]

Hmmm the data sheet percentage changes are not consistent between films. I should compare it to 1:1 times maybe...

I use seasoned/Replenished Xtol and 1+1 is the normal reference or starting point. I found that my mix lands me Just about in the middle of what would be 1+1 and 1+2, but that's only with Ilford FP4+ and HP5+ 120 film. the HP5+ is a little closer to what would be 1+2 and FP4+ is closer to the 1+1 equivalent. This is all in a two reel stainless steel tank done with my itty bitty hands and not a Jobo. I do know that when I used Foma 400 a few times I really had to cut back on my times some since it builds contrast rather fast and I lost all detail in my highlight.

 

[John Wiegerink]

I use seasoned/Replenished Xtol and 1+1 is the normal reference or starting point. I found that my mix lands me Just about in the middle of what would be 1+1 and 1+2, but that's only with Ilford FP4+ and HP5+ 120 film. the HP5+ is a little closer to what would be 1+2 and FP4+ is closer to the 1+1 equivalent. This is all in a two reel stainless steel tank done with my itty bitty hands and not a Jobo. I do know that when I used Foma 400 a few times I really had to cut back on my times some since it builds contrast rather fast and I lost all detail in my highlight.

Whoops! I might be misunderstanding the OP's question?

 

[Gerald C Koch]

If you mean replenished Xtol then the following comment is appropriate. Years ago when Agfa manufactured a film developer called Atomal they supplied a rather complex set of instructions. It wasn't a matter that if the developer had not been used in X number of days you extended the time by Y%. It was much more complicated. The new time depended on

o Number of days since last replenishment
o Number of rolls developed
o Age of stock solution (self replenished)
o Storage conditions

In other words if the OP is looking for a simple equation to determine the new development time then one doesn't exist. There are just too many variables. Since over development is preferable to under development it is better to err on the side of over development in using any guesaiment.