[Frameworks] [Labos] E6 : tetenal or cinestill ?

[Scott Dorsey]

The first developer is an ordinary metol-hydroquinone developer, but there
is stuff in there to make sure that the development action takes place in
all three layers identically.

If the curves are not identical, you can get "crossover" where the shadows
are green but the highlights are magenta and you can compensate for one or
the other in printing but not both.

The original E4 process used a conventional developer not much different than
D-19, but with additional pH buffering and it had to be kept within a very
very narrow temperature range with water jackets on everything.

But... if you are looking for interesting color effects and you don't 
necessarily care about repeatability, you can do that, and I suspect you
may have some people who are in that category.
--scott