Hello Jörg,
I´m back to XTOL because of some problems with HRX-2 in the past (problems with mildew).
I've never had any problems with HRX-2, neither with normal shelf life nor with mildew. But I have stored the developer always properly in full glass bottles. I am doing this always with all my developers.
The manufacturer improved the formula of HRX-2 almost two years ago to avoid mildew even under not optimal storing conditions.
So it was not a problem with the last batches of HRX-2 anymore.
And HRX-2 is the past. We want manufacturers to improve their products, so here we go.
HRX-3 has also protection against mildew and an improved overall shelf life of two years (proved by an independant chemist).
And a shelf life of two years should be sufficient to expend a 250 ml bottle during this time
.
I have some advantages with XTOL if I use a dilution of 1+3: The grain is same than HRX (2), the sharpness also, but I get a lot more Filmspeed with all kinds of films I use.
My experinece is a bit different (with Ilfords Deltas, TMY-2):
XTOL 1+3: finer grain and a bit better sharpness with HRX-3
XTOL 1+2 and 1+1: similar grain level, but better sharpness with HRX-3
The HRX-3 negatives are looking more "crisp" in comparison. Of course, this is often a matter of taste. I like it.
Best regards,
Henning