Very Old Latent Image

In article ,
Geoffrey S. Mendelson wrote:

The development process for the Ektachrome films was more of a simplification
than a major change in chemistry. What used to be develop, stop bath, rinse,
expose to light, color develop, stop bath, bleach, fix and stabilize has
be reduced to three steps that do basicly the same things, using mostly
the same chemicals.

E6 is a 6-step process. There are 3-step processes that will give you a
color image from films intended for process E6, but they will not give
you a very _good_ color image!

The biggest change in chemicals was in E4 going to E6 and c22 going to c41
with the elimination of formalin as a stabilizing agent. That was done for
environmental and personal saftey, the other changes were to increase
automation and decrease processing time.

Actually, the removal of formaldehyde from E6 and C41 was a very, very
late change. It required the reformulation of dyes in some C41 films,
which was probably pretty painful for Kodak to do. You can still get
the older type of stabilizer because there are still films which require
it; these process changes were made only about five years ago.

--
Thor Lancelot Simon
"Even experienced UNIX users occasionally enter rm *.* at the UNIX
prompt only to realize too late that they have removed the wrong
segment of the directory structure." - Microsoft WSS whitepaper

On Wed, 10 Dec 2008 22:37:44 UTC, VOR-DME wrote:

Thanks to all for taking the time to provide these informative responses.
Greg Miller's service looks like a good bet to me - I have looked it up
and the prices are more than reasonable as well.

I'll get back to you all here to let you know how it worked out.
_____
About 5 months ago i found some Tri-X 120 and 220 rols i had exposed
in 1993. I made up a fresh batch of D76, and processed the rolls
using a 15% increased development time to improve contrast. Yes,
there was more base fog, but the negatives were quite printable.

/ J

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