How inthe heck? (FF No.1 Monobath Developer)

[peter k.]

Hmmm never done monbath developing, ... looks interesting.
"ROOM-TEMPERATURE development (70-72°F or 21-22°C." for 6 min
No big deal as you can make changes to development time for the temp, but from research we guess the older monobath solutions have to be @ a higher temp..
Whats fascinating is not one shot or a replenished developer, and the development time remains the same.
How can this be???
How can the development me the same time and not be changed if not replenished?
Generally does not seem to be popular, so what are its draw backs besides initial cost?


Background:
Scott: @ Film Ferrania used some to develop
https://www.photrio.com/forum/threads/film-ferrania-p30.146259/page-27
post #672
~~~~~
checking @ Freestyle Photo
500ml bottle develops about 200 square inches of film:
35mm (36 exposures) 4 rolls (as Scott posted...)
120 roll film 6 rolls
4x5 sheet film 10 sheets

 

[wblynch]

You don't have the control you might want over the development. My only hesitation is the cost when they say 1 liter can only develop 6 or 7 rolls. That ends up close to $4 per roll. With HC-110 my cost is nickels.

I did see some examples of the new Ferrania P30 in FF1 monobath that were just gorgeous.

 

[Gerald C Koch]

In a monobath there are two competing reactions; development and fixation. Both reactions are affected the same way by temperature. Therefore changing the temperature has no overall effect.

 

[David A. Goldfarb]

Here’s the big monobath thread:

https://www.photrio.com/forum/threads/monobath-developers.10935/

 

[Scott Micciche]

I found this monobath worked well. I own and have read Grant Haist's "Monobath Manual", but apparently times and chemistry have changed. This no longer requires high temp that might cause reticulation.

It kept grain low, is easy to handle (aside from odor) and produced some really nice negatives. Here is a link to the latest P30 roll, 80ASA, 71F for 6 minutes, 5 minute wash (Patterson hose), photo-flo and dry overnight in a cabinet. Pakon F135 scans to raw, inverted in colorperfect's colorneg mode, no other modifications.

https://www.flickr.com/photos/thekurgan/albums/72157696553030865

Cheers.