New Jobo Chemistry Announcement

[bmikiten]

Jobo placed an announcement on Facebook (See below) about the new Alpha Film Developer. Does anyone have any other insight? It isn't on the Jobo-USA site. 248193


JOBO alpha is optimized to develop B/W negative films in rotary processing. What the JOBO alpha developer stands for: fine grain. High sharpness. Great use of film speed.
In combination with teh JOBO alpha neutral fixer, the entire process takes place in an alkaline to pH-neutral environment. A short wash replaces the usual stop bath. The whole process is gentle on the film and highly ecological. It saves chemicals and water whilst achieving high long-term stability.
JOBO: pure. analog. passion.

[ic-racer]

Looks promising.

[Oren Grad]

The data sheet is available from the main Jobo (Germany) site - click on the References/Downloads tab in the middle of this page:

https://www.jobo.com/en/chemistry/9511-b-w-developer

[bmikiten]

Interesting that it is a two part mix. It doesn't appear in the typical stores in the US. I'll do some testing and plot curves when I get it.

[bmikiten]

It just showed up on the CatLabs site FYI. https://www.catlabs.info/product/alpha

[Kiwi7475]

Interesting! What makes this developer “optimized for rotary processors”?

[phdgent]

Interesting! What makes this developer “optimized for rotary processors”?

I guess it is perhaps somewhat lower contrast as the rotary process is actually a continuous agitation?
And if it is, then it might be interesting while shooting roll film during the summer, when the light is harsher, to use it in a hand agitated tank?

[Michael R]

Interesting! What makes this developer “optimized for rotary processors”?

Marketing.

[ic-racer]

Yes, at 24C, some developers 'not optimized for rotary' will have times less than 4 min.

[Tin Can]

alpha

[bmikiten]

Probably low oxidation of the developer. There is such a thing as different changes in developers based on closed versus open environments.

[AuditorOne]

Love to try some but I don't do Paypal.

[bmikiten]

You might call him. I'm pretty sure I've made purchases directly from the shop via a credit card. Many e-commerce sites didn't update to the new credit card selection options and defaulted to PayPal. It *kind of* looks like that here.

[Peter De Smidt]

It sounds like a phenidone/ascorbate developer, but that's just a guess.

[Michael R]

It sounds like a phenidone/ascorbate developer, but that's just a guess.

The developing agents are CD32 and HQMS. The alkali is sodium carbonate.

[Peter De Smidt]

The developing agents are CD32 and HQMS. The alkali is sodium carbonate.

Thanks, Michael.