That pH is wrong, Calbe R09/APH09 has no free Hydroxide and when manufactured the concentrate is pH 11.8, that will reduce with dilution.
Originally Posted by georg16nik
Agfa Rodinal, now called Blazinal, Adonal etc is pH 14 because of the excess Hyrdoxide.
Now the higher pH has no effects with most films, but a a few can suffer reticulation if you don't process carefully keeping temperatures close between all stages including washing.
The excess hydroxide will soften some emulsions sufficiently to allow temperature deviations to cause micro (surface) reticulation which accentuates grain in prints/scans, or full reticulation. At it's mildest this is one reason some thnk Rodinal isn;t a very fine grained developer.
Last edited by Ian Grant; 08-11-2011 at 08:11 AM. Click to view previous post history.