Kodak Datasheets: Large vs Small Tank dev times

[RoboRepublic]

Two questions in one, weekend special:

Kodak seems to think that small dev tanks are 16oz and smaller, and large tanks are 64oz and up. They give no guidance for those of that use 32oz / 1 Liter inversion tanks. Which development time are you folks using?

I'm hoping to process TX400 and TMY-2 (Tmax 400) in the same tank using XTOL. I was hoping to just develop everything for 8 minutes. But having fried my highlights on Tmax before in HC110 I thought to ask folks here if this is a bad idea.

 

[mshchem]

Large tanks refer to hard rubber sheet film tanks. Kodak had hard rubber tanks, 1/2 gallon, 1 gallon and 3 1/2 gallon tanks for sheet film on hangers. Always replenished. If you are using reels/spirals in a daylight tank use the small tank scheme.

 

[mshchem]

Two questions in one, weekend special:

Kodak seems to think that small dev tanks are 16oz and smaller, and large tanks are 64oz and up. They give no guidance for those of that use 32oz / 1 Liter inversion tanks. Which development time are you folks using?

I'm hoping to process TX400 and TMY-2 (Tmax 400) in the same tank using XTOL. I was hoping to just develop everything for 8 minutes. But having fried my highlights on Tmax before in HC110 I thought to ask folks here if this is a bad idea.

IIRC 7 minutes should be OK for both at 68F .

 

[Steven Lee]

I have always interpreted Kodak's small tank language as home tanks. The Xtol datasheet suggets 8:30 diluted 1+1 for both TMY-2 and Tri-X @20C, and I would do exactly that. Being gentle with the highlights is one of Xtol signature features, so don't lower the time.

 

[mshchem]

 

[MattKing]

Small tank = 8 - 64 ounces according to J-107 - one of the three datasheets issued in 1996 along with the introduction of X-Tol.

Those would be US fluid ounces.
8 oz. = ~237 ml
64 oz. = ~ 1.9 litres

 

[mshchem]

I XTOL, in part because the Original Eastman Kodak Co work in providing so much information.

 

[Anon Ymous]

@RoboRepublic Another detail is agitation interval. For large tanks they suggest agitation at 1' intervals, whereas for small ones it's 30". It's not a matter of volume. And keep in mind that most of the times for large tanks are for seasoned developer in replenished processing (although they do provide times for large tanks and fresh developer).

 

[RoboRepublic]

Thanks everyone Is there any reason why dev times vary by tank size? I've been using the stock solution with replenishment for the better part of last year and I always wondered as to the reasons why theres just two different worlds based on tank size.

 

[MattKing]

Thanks everyone Is there any reason why dev times vary by tank size? I've been using the stock solution with replenishment for the better part of last year and I always wondered as to the reasons why theres just two different worlds based on tank size.

Most likely because agitation in a gallon tank is likely to be quite different than in a small tank.
I don't think most of us are up to doing inversion agitation with a 5 gallon tank
That plus differences in the amount of oxidation.
In addition, almost all large tank development is done using replenished chemicals.