Yes, I did those experiments when the price of silver was much much lower.
When you give keeping times for the emulsion, is that refridgerated or at RT?
IIRC G. points to the instability of the particular metal complex used and suggests that a double salt would be better. He said it fell to a grade 3 I think.
As far as the compound crystallizing I thought I had seen a possible reason / solution the last time we discussed it, but I haven't tested my hypothesis.
(I don't have the compound in question.)
I found that the strictly "pure" silver halides are more problematic.
There are many differences.
But emulsions are very plastic, and all in all,
the differences can be dealt with.
YMMV but for the most part,
Either emulsion engineers engineer emulsions efficiently
or easy-going enthusiasts enjoy evolving.
These things generally have multiple controls:
Crystal habit, curve shape, D-max, stability, tone, toning behaviour, development rate, fixing rate, environmental friendliness, etc.
As I mentioned above, I found the "pure" halides less than optimal.
I searched a long time for the reason, thought I had found it, but now can't remember what it was.
I would say yes, but there are noteable exceptions. A lot of papers used today are different and slower special purpose films might be ClBr.
Last edited by Ray Rogers; 03-13-2011 at 06:12 AM. Click to view previous post history.