KODACHROME

dmr · Jun 26, 2007

PKM-25 said:
That is the highest I have ever seen a brick of 10 KM 25 go for!

OMG! That's US$43.00 and change per roll! Expired, even!

PKM-25 · Jun 26, 2007

dmr said:
OMG! That's US$43.00 and change per roll! Expired, even!

Not only that, there is no guarantee it was ever frozen! At that rate, my stash of it comes to nearly 7 grand, LOL!!

spark · Jun 26, 2007

Stuff is probably good without the freeze- I shot a roll of KM25 from a similar vintage batch stored under deep refridge a few months ago in Hawaii - still incredible.

dmr · Jun 26, 2007

PKM-25 said:
At that rate, my stash of it comes to nearly 7 grand, LOL!!

Yeah, uh, I never thought of expired film as an "investment" before.

Of course I never thought of the whims of those who buy on Ebay either.

PKM-25 · Jun 26, 2007

dmr said:
Yeah, uh, I never thought of expired film as an "investment" before.

Of course I never thought of the whims of those who buy on Ebay either.

Yeah, I bought it to shoot it, film these days is an investment. I have lots of black and white stocked so I can be sure to have enough to shoot in the future if things get weird..

I'll shoot every last roll, none of it is going on ebay.

Helen B · Jun 26, 2007

Dead Link Removed

Leopold Godowsky plays the violin while Leopold Mannes sits at the piano with a cable release in his hand. 1/10 at f/4. 35 mm Kodachrome Type A. From Town and Country April 1940. The picture on the wall is of David and Clara Damrosch Mannes, Leopold Mannes' parents.

AgX · Jul 1, 2007

kraker said:
Actually, Germany is a "special one".

Seems so...

Many, many years ago I exposed a lot of Kodachrome films in the USA bought there without processing included. Having brought those films back to Germany I inquired at a renown professional photo supplier. I was offered special Kodak envelopes, bought them, sent my films to Kodak. And, never saw any of those films again... Enough reason for me to process my films by myself.

RoBBo · Jul 2, 2007

How about this.
Kodachrome in other chemicals.
Would it even develop a proper image in E6 or C41?
I'd imagine it wouldn't look 'right' but would it even do anything?

Photo Engineer · Jul 2, 2007

RoBBo said:
How about this.
Kodachrome in other chemicals.
Would it even develop a proper image in E6 or C41?
I'd imagine it wouldn't look 'right' but would it even do anything?

Old old old question.

In E6 or C41, Kodachrome will give blank, clear film.

PE

AgX · Jul 2, 2007

RoBBo,

Doing so would only result in a blank film.
You are right "it wouldn't look right"...

Both processes develop a silver image. The E-6 process even two, a negative and a positive. Bad sad enough both are bleached out later within the process.

Kodachrome has got NO colour couplers in the emulsion, thus called `non-substantive´, and thus needs a process which transferes those into the emulsion.

C-41 and E-6 films HAVE got couplers within the emulsion, thus called `substantive´.

srs5694 · Jul 2, 2007

I've never tried it myself, but it's my understanding that Kodachrome can be processed in conventional B&W developers, yielding a B&W negative. I suppose that would qualify as colors that "wouldn't look 'right.'" I'm not sure why you'd want to do such a thing, unless maybe you've got some long-expired Kodachrome and you just want to play around with it. Conventional B&W films are far less expensive than Kodachrome.

AgX · Jul 2, 2007

To my understanding this is done to yield a timely result.

Photo Engineer · Jul 2, 2007

Kodachrome, or any color film, developed in a B&W process will yield a good negative with a heavy yellow cast due to the incorporated blue absorbing CLS layer.

These negatives are very difficult to print on MG papers.

PE

ZorkiKat · Jul 9, 2007

Photo Engineer said:
Kodachrome, or any color film, developed in a B&W process will yield a good negative with a heavy yellow cast due to the incorporated blue absorbing CLS layer.

These negatives are very difficult to print on MG papers.

PE

What "destroys" this layer?

Helen B · Jul 9, 2007

ZorkiKat said:
What "destroys" this layer?

Being silver (Carey Lea silver) it is removed by bleach.

Best,
Helen

Photo Engineer · Jul 9, 2007

Helen B said:
Being silver (Carey Lea silver) it is removed by bleach.

Best,
Helen

Along with all other silver.......

So, if you are using a B&W process for Kodachrome, you cannot do this. In color, it is just fine.

PE

AgX · Jul 9, 2007

Helen,

Thank you for unveiling the term `CLS´. Especially as there are a few members from a non-English world.
The nature of this layer was known to me, but over here, and most probably elsewhere, it is referred to as a colloid silver filter layer. And I could not trace that abbreviation in my books even including the Neblette, Mees&Jones and many others written in English. (I finally found Carey Lea in the M&J bibliography…)
Interesting might be that Orwo once made such a layer obsolete because they experienced complex reactions with the adjacent layers causing a reddish fogging (`contact fogging´ in translation).

CRhymer · Jul 9, 2007

Photo Engineer said:
Along with all other silver.......

So, if you are using a B&W process for Kodachrome, you cannot do this. In color, it is just fine.

PE

It is true that dichromate or permanganate will bleach away the CLS as well as the image. I have tried to selectively bleach the CLS and leave most of the image with some modest success, but as PE has said in another thread some time ago silver is silver. However, I have been reading Grant Heists book Modern Photographic Processing and on page 260 of Volume I he says, An acid solution of ammonium thiosulfate, especially a rapid fixer with a hardener, is an excellent slow-acting silver remover when 15 to 30 g of citric acid are added to a liter of the working solution of the fixing bath.

He suggests this as a method to remove dichroic fog, on the basis that the fine grains of dichroic fog will be removed before the much larger grained image silver is removed.

I dont know the actual size of CLS grains, but I suspect they are very small to be a blue filter.

I only saw this a few days ago and have not had a chance to try it.

Any thoughts?

Cheers,
Clarence

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