Re: HIE in Diafine?

[Larry Bullis <lbullis@xxxxxxxxxxx>]

>Has anybody tried developing HIE in Diafine? It gives between one and two
>stops extra speed to conventional b&w films, but it isn't predictable- it

My experience with diafine has been that rather than giving such a great 
Increase in speed, it just seems to enable the film to perform adequately 
at the nominal rating, whereas most developers require a decrease in the 
practical ISO index in order to produce the kind of shadow saturation my 
eye requires.  That said, it's a great developer.  I haven't tried HIE 
with it but would certainly like to hear about anyone's experience.  I am 
very partial to split developers.  

My suspicion, though, is that there may not be enough retention in the 
emulsion of the A part to supply adequate reducer to satisfy the needs of 
the exposed silver.  This may be an advantage, though, in that it could 
make it a lot less likely that the highlights will block up.  That is, it 
could have a compensating effect, which may be very useful.  

Larry Bullis
Skagit Valley College


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