1 Attachment(s)
New Jobo Chemistry Announcement
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. Attachment 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.
Re: New Jobo Chemistry Announcement
Re: New Jobo Chemistry Announcement
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
Re: New Jobo Chemistry Announcement
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.
Re: New Jobo Chemistry Announcement
It just showed up on the CatLabs site FYI. https://www.catlabs.info/product/alpha
Re: New Jobo Chemistry Announcement
Interesting! What makes this developer “optimized for rotary processors”?
Re: New Jobo Chemistry Announcement
Quote:
Originally Posted by
Kiwi7475
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?
Re: New Jobo Chemistry Announcement
Quote:
Originally Posted by
Kiwi7475
Interesting! What makes this developer “optimized for rotary processors”?
Marketing.
Re: New Jobo Chemistry Announcement
Yes, at 24C, some developers 'not optimized for rotary' will have times less than 4 min.
Re: New Jobo Chemistry Announcement