[Photo Engineer]

And of course time and temperature of both the first digestion and then the ripening stage are equally critical

Ian

Ian;

Yes, and you might also include the addition rate of the ingredients during the growth stage and what type of rate you are using, linear or quadratic. You would also have to add the type of agent used for soluabilization in the digest etc. etc. So, I went for the KISS principle.

I should add that we distinguish ripening and digestion as follows:

Ripening is a change in crystal size, shape or habit with no added chemistry and basically relies on the soluability of the crystals already formed, and the halide salts present.

Digestion is just as above, but relies on an externally added silver halide solvent such as ammonia.

Both can go on at the same time, but only Ripening is an integral part of a precipitation. Digestion is initiated by an external addition.

As given then, the OP applies to simple SR (single run) or RS (run salt and silver) emulsions, and to their initial condition. To add all of the other factors that I began listing above in this post would further compound the confusion.

Suffice it to say, if all else is held constant and you apply that list to a given emulsion's initial condition, you will see the effects I have stated.

PE