Re: Konica Reticulation

[eml@xxxxxxxxx]

> 
> eml@xxxxxxxxx wrote:
> > 
> > Haven't shot any lately, but when I lived in Florida, I used to
> > have to process Konica IR750 (120 size) at temps as high as 32C (90F).
> > I never got any reticulation at all, and aleways, the emulsion side
> > of the negative seemed to be very shiny and with no physical
> > graininess.  Are you using a stop bath, possibly with a developer containing
> > carbonate for an alkali?  This could cause reticulation.  The film has been
> > so good for me that I can't imagine it ever reticulationg unless abused, as
> > above.
> 
> I always use a stop bath and have had no problems with any other films. 
> Development, as always, has been with Rodinal.
> 
> george
> 
There would only be a possible problem with developers that use carbonate
salts as alkalis.  In that case, CO2 gas evolves within the gelatine
emulsion when the developer-saturated film is placed in an acid solution.  
Rodinal's alkali is Potassium Hydroxide, or at least was, in the classic 
formula.

What they've done since 1986, when they apparently reduced the developer
concentrate's strength by 1/3 to 1/2 is anybody's guess, but Rodinal
cannot contain carbonate as Para-Aminophenol precipitates from carbonate
solutions, and can only be used in dilute developers and not concentrates
for that reason.

Regards,
Ed

- -- 
    _/_/_/_/ _/_/    _/ _/   | Edward M. Lukacs 
   _/       _/ _/ _/_/ _/    | eml@xxxxxxxxx 
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 _/       _/      _/ _/      | Washington, DC 20007
_/_/_/_/ _/      _/ _/_/_/_/ | Telephone: 202-338-1489

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