Ektachrome color shift?

K25 was discontinued due to the sudden unavailability of a certain
chemical component, according to Kodak.

K25 was discontinued due to the sudden unavailability of a certain
chemical component, according to Kodak.

"Nate" wrote in message
...
I have a few hundred slides that were exposed and processed in the
late 1950's and early 1960's. The slides are both Kodachrome and
Ektachrome. I have noticed a distinct difference between them.

The Kodachrome slides appear very good in their color balance - many
of them look like they were taken yesterday. All of the Ektacrhome
slides have a dominant red color. I am hoping that I can adjust for
this after scanning them.

Can anyone tell me why the E-6 slides have this red color shift?

Those are E-4 slides and their cyan dye has faded out.

Would they have looked more balanced 45 years ago when they were first
processed?

Yes. They would have looked quite normal.

The newer E-6 process (which has been refined several times) was introduced
partly to get around this fading problem, as I understand it.

"Nate" wrote in message
...
I have a few hundred slides that were exposed and processed in the
late 1950's and early 1960's. The slides are both Kodachrome and
Ektachrome. I have noticed a distinct difference between them.

The Kodachrome slides appear very good in their color balance - many
of them look like they were taken yesterday. All of the Ektacrhome
slides have a dominant red color. I am hoping that I can adjust for
this after scanning them.

Can anyone tell me why the E-6 slides have this red color shift?

Those are E-4 slides and their cyan dye has faded out.

Would they have looked more balanced 45 years ago when they were first
processed?

Yes. They would have looked quite normal.

The newer E-6 process (which has been refined several times) was introduced
partly to get around this fading problem, as I understand it.

writes:

Why did Kodak stop producing Kodachrome 25?

People stopped buying it.
- now -
Why did people stop buying it?

I'll start things off: I only use Kodachrome for slides, so
I am not the one to ask.

--
Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics; Informatics; Photonics.
Remove spaces etc. to reply: n o lindan at net com dot com
psst.. want to buy an f-stop timer? nolindan.com/da/fstop/

writes:

Why did Kodak stop producing Kodachrome 25?

People stopped buying it.
- now -
Why did people stop buying it?

I'll start things off: I only use Kodachrome for slides, so
I am not the one to ask.

--
Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics; Informatics; Photonics.
Remove spaces etc. to reply: n o lindan at net com dot com
psst.. want to buy an f-stop timer? nolindan.com/da/fstop/

No, this is not true. Kodachrome 25 was discontinued solely for
technical reasons.

If you don't know anything, shut the hell up!

No, this is not true. Kodachrome 25 was discontinued solely for
technical reasons.

If you don't know anything, shut the hell up!