Massive Dev Chart with Rotary?

[Tomsmac]

Good evening. I just purchased the massive dev chart app. Is there any adjustments that need to be made for when using a JOBO rotary system?

I thought the rotary process required less chemicals and possibly different times.
Than you.

[Alan9940]

Unless the MDC development time specially notes that it's a rotary time, then I usually drop about 15% off as a starting point. I know others who stick with the inversion time. Testing will tell the tale for your working methods.

[Kiwi7475]

Usually the answer is in the developer or the film manual. And usually, without pre wash it’s 10-15% shorter for continuous rotation, and no change with pre-wash. But different ones make different suggestions (and some film manufacturers don’t recommend pre-wash).

Ultimately you need to try it for yourself and determine it for your own processing. However the above is a good starting point.

[sperdynamite]

I always do a pre-wash when using my ATL processors and do not adjust time.

[Deyoung]

Like Kiwi7475 and sperdynamite, I have found that doing a prewash and don't adjust the time with my jobo.

[cuypers1807]

I prewash and don't adjust the time.

[thornhill]

You could try going into the Time/Temperature conversion. There's a query in there as to whether you'll be agitating constantly or not. I think it just deducts 15% from your dev time. My ATL-1000 runs BW at 24C so that conversion tool works out pretty handy for temperature too.

[Tomsmac]

15% seems to be the consensus. However there are exceptions, I see one of them being if you prewash the film it does not have to be deducted off of your development time. I think I’m going to do that.

[Alan9940]

15% seems to be the consensus. However there are exceptions, I see one of them being if you prewash the film it does not have to be deducted off of your development time. I think I’m going to do that.

Try it both ways. I do pre-wash my film and I still reduce development time by about 10 - 15%.

[Serge S]

Same here -15%

FYI: The prewash works best for me for nice even dev


Try it both ways. I do pre-wash my film and I still reduce development time by about 10 - 15%.

[wooserco]

Per JOBO USA (when they were still in Ann Arbor, MI) I've always used a 5 minute presoak (rotating on the machine) and published times for the film and developer.

[rjbuzzclick]

-15% and no pre-wash for me.


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