Hi

Please help me understand the difference between these developers, as their datasheets really doesn't shed any light on it (and I am not chemical engineer or expert :P)-
I've used TMax developer, XTol and currently HC-110 and I find it difficult to find any huge differences in these.

I can push Acros to 400 with HC-110 easily, and with good results, even though the datasheet doesn't say so for that developer for example.

So what gives?

KODAK PROFESSIONAL HC-110 Developer
HC-110 Developer is a highly concentrated liquid developer. It is intended for use with a variety of black-and-white films, some graphic-arts films,
and some glass plates.
It can be used for replenished and non-replenished systems.
Use KODAK PROFESSIONAL HC-110 Developer Replenisher to replenish.

http://www.kodak.com/global/en/profe...bs/j24/j24.pdf

KODAK PROFESSIONAL XTOL Developer
XTOL Developer is a two-part powder developer for processing Kodak and other manufacturers’ normally exposed, pushed, or pulled
black-and-white films. It offers full emulsion speed and easy mixing, and can be used as both a developer and a replenisher in a variety of equipment, from small tanks (8
to 64 fluidounces), trays, or rotary tubes to high-volume processors.

http://www.kodak.com/global/en/profe.../j109/j109.pdf

KODAK PROFESSIONAL T-MAX Developers
T-MAX Developer is a moderately active, liquid black-and-white film developer that offers enhanced shadow detail in normally processed
and push-processed films.

http://www.kodak.com/global/en/profe...bs/j86/j86.pdf

KODAK PROFESSIONAL D-76 Developer
D-76 Developer provides full emulsion speed and excellent shadow detail with normal contrast, and produces fine grain with a variety of
continuous-tone black-and-white films.
For greater sharpness, but with a slight increase in graininess, you can use a 1:1 dilution of this developer.
It yields a long density range, and its development latitude allows push processing with relatively low fog.

http://www.kodak.com/global/en/profe...bs/j78/j78.pdf


I'm none the wiser, but HC-110 works very nicely with most films I've tried so far (Acros, Neopan 400, Roillei IR400).
Why are there so many different types here?