MOD54 vs. Jobo 2509n minimum developer for 6-sheet inversion processing

[Simos Xenakis]

Halford, wow, that's a Paterson 3-reel tank (the PTP116)?

[ruilourosa]

Lowest quantity possible: paterson orbital!

[Huub]

b) how does the above answer change with rotation processing on the Jobo? The website says: "High efficiency; run as few as two sheets of 4X5 with no waste of chemistry." Having a hard time understanding what that means. Isn't the minimum volume for rotary processing 270ml? According to what I've read here, that is the same minimum volume needed for 6 sheets. If so, that means the tank is NOT efficient for 2-sheet processing, since you'd be able to get 4 additional sheets out of the solution if you maxed out the 4x5 reel. What am I missing about their claim that it's a "high efficiency" tank?

270 ml is indeed the minimum amount of solution you need to use for rotary processing with this tank. It depends a lot on the dilution of your developer how many sheets 4x5 you can do with this volume. With 1+1 XTOL or D76 it would be 6 sheets as the minimum amount for these developers is 150 ml of stock solution for 6 sheets. If you would go down to 1+3 and using 70 ml of stock solution with these developers it would only be 3 sheets.

In both cases it is much more efficient then the 1 L of 1.5 L you would need for inversion with the MOD54 or the Jobo.

[Light Guru]

If you want to do inversion DONT use the mod45. The mod45 has a vary bad problem of having film sheets come loose ruing not only the sheet the came loose but the sheet next to it in the holder.

The mod45 however is perfect for stand developing however.

[Michael W]

I do inversion processing with MOD54, four to six sheets, no problems with sheets moving.

[Ian Gordon Bilson]

If you want to do inversion DONT use the mod45. The mod45 has a vary bad problem of having film sheets come loose ruing not only the sheet the came loose but the sheet next to it in the holder.

The mod45 however is perfect for stand developing however.

My experience,in a nutshell. Terrifying to load, leaves flow marks around the fingers.Many users report it being ok if only 4 sheets loaded. Being ok for stand development says it all,really (re Light Guru's comment). If you consider Replenished XTOL , you have the economy sorted,so you are free to source any other tank system, as you only have to discard/add 70-80 millilitres of stock for each 4x5 sheet.
I love the Combiplan,but I have the luxury of a proper darkroom.

[koraks]

I do inversion processing with MOD54, four to six sheets, no problems with sheets moving.

Dito. Inversions must be done gently to prevent the sheets from dislodging. But with a little care it works great. I have had no surge marks except when I tried stand development.

[jose angel]

Another MOD45 user here. I`d say it is somewhat easy to came loose the film if -extra care- is not taken.
When the tank is inverted gently, I`m able to perform four inversions in less than 15" without any problem. I do it quite often.

[Halford]

Halford, wow, that's a Paterson 3-reel tank (the PTP116)?

Nope that was a 2-reel tank. The 3-reel really is taller than the Jobo

[Simos Xenakis]

270 ml is indeed the minimum amount of solution you need to use for rotary processing with this tank. It depends a lot on the dilution of your developer how many sheets 4x5 you can do with this volume. With 1+1 XTOL or D76 it would be 6 sheets as the minimum amount for these developers is 150 ml of stock solution for 6 sheets. If you would go down to 1+3 and using 70 ml of stock solution with these developers it would only be 3 sheets.

In both cases it is much more efficient then the 1 L of 1.5 L you would need for inversion with the MOD54 or the Jobo.

Thanks, Huub, and yeah, that's what has me second guessing inversion processing all together.

If you want to do inversion DONT use the mod45. The mod45 has a vary bad problem of having film sheets come loose ruing not only the sheet the came loose but the sheet next to it in the holder.

The mod45 however is perfect for stand developing however.

I do inversion processing with MOD54, four to six sheets, no problems with sheets moving.

My experience,in a nutshell. Terrifying to load, leaves flow marks around the fingers.Many users report it being ok if only 4 sheets loaded. Being ok for stand development says it all,really (re Light Guru's comment). If you consider Replenished XTOL , you have the economy sorted,so you are free to source any other tank system, as you only have to discard/add 70-80 millilitres of stock for each 4x5 sheet.
I love the Combiplan,but I have the luxury of a proper darkroom.

Dito. Inversions must be done gently to prevent the sheets from dislodging. But with a little care it works great. I have had no surge marks except when I tried stand development.

Another MOD45 user here. I`d say it is somewhat easy to came loose the film if -extra care- is not taken.
When the tank is inverted gently, I`m able to perform four inversions in less than 15" without any problem. I do it quite often.

Nope that was a 2-reel tank. The 3-reel really is taller than the Jobo

So many mixed reviews on MOD54 (as well as the Jobo 2509n). Makes me wish I had a proper darkroom so I could tray process my film.