Konica display film

pierre506 · Mar 17, 2014

Any body knew such kind of film?
I got few information about it.
1. Triple thickness of normal film
2. E6 developing
3. ISO around 10

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AgX · Mar 17, 2014

Display films are films that have emulsions quite similar to papers. They are made to yield positives on transparent film base or translucent white film base, to be mounted in lightboxes.
As they are not reflective they need to yield twice the density of papers. Typically they are negative materials (RA-4) but your material is to be reversal processed (E-6) to be exposed with slide film.

pierre506 · Mar 17, 2014

Thank for your information.
Any idea of exposure and developing?

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AgX · Mar 18, 2014

I just took over that E-6 thing from you. As indicated above I wonder about that.

I found data on the successor of your paper and that is designed for the reversal paper process R-3.

AgX · Mar 18, 2014

I mixed things up in the post above

The R3-material I refer to is an actual paper and successor of a "SR"-paper, not -film.

So far I found nothing about your reversal display-film.
Furthermore using a E-6 emulsion for display film is not likely. It most likely would be modified. The same as their R-3 Emulsion, that would have been modified for density too, but would be more apt for the user.
Are you sure about that E-6 thing, or even a reversal process at all?

Most likely it is a RA-Display film.

pierre506 · Mar 18, 2014

Thank you.
All the information above were from the seller.
Now he would cut some of it and send to me.
I will try to test it by E6 using jobo processor.
Could I develope it by R-3 by myself?
I do not know R-3 chemical and process before.

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MartinP · Mar 18, 2014

Unless it this extremely ancient (pre-RA4), all the display-films I can recall seeing were the same process as paper - RA4. They would be processed in the usual Kreonite type roller processor. Did anyone ever hear of an E6 roller processor over a meter wide??? Biggest would have been for aerial E4 and E6 films of 9 1/2" or so surely??

I'd suggest that it is most likely RA4 and should be processed as paper. The same RA4 process is used for the current digital-exposure printing machines, so the chemistry is relatively easy to find or beg for a test.

Given the age of the material you may have some 'different' results, with fog and colour-casts at least.

Could it be possible that the seller got confused somewhere, and the paper is a reversal material intended for printing from transparencies (ie. from E6 slides) ?? So far as I know, as the reversal-materials haven't been made for decades (completely different stuff to Ilfochrome), the reversal-paper type chemistry is no longer produced I think.

pierre506 · Mar 18, 2014

He will cut it to some small pieces, such as 8x10 in to me. Then jobo can bear them.
Does it mean I can develop it by R-3 as RA4 by myself if E6 did not work?

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AgX · Mar 19, 2014

R-3 (a paper reversal process) is obsolete meanwhile. You would have to make the processing bath from scrap.

AgX · Mar 19, 2014

Martin put it very well:The seller might refer to a film used to make displays from E-6 films itself being a R-3 material.

Displays were typically made in large numbers and and thus would it be more easy to make an internegative for using RA-4 display film than holding a seperate, reversal display film and wide reversal processing in reserve for transparency originals.
In case though the lab offered extra wide direct prints from slides that processing facility existed.

So, maybe some other member can identify that material by its designation.

JoJo · Mar 21, 2014

You can develop this material RA-4.
The material is similar to material from other manufacturers like ILFOclear, ILFOtrans, AGFAclear, AGFAtrans, Kodak Endura Clear, Kodak Endura Trans.
It is a nice material for doing large slides from negatives (see my picture of a 20x30cm print).
But it is a material for negative color process and so it is not good to be used as a camera film because of the necessary red filter.
One challenge is to find out the emulsion side in the darkness. The surface is very glossy on both sides. Wetting a finger and touching at an egde will show you the emulsion side (where the surface sticks on the finger a bit).
This material looks very old. It will probably have yellow/brown stain and may be fogged.

Note that you need about double the developing time in RA-4 because of the thickness of the emulsion.

Joachim

pierre506 · Mar 25, 2014

Thank you all.
I know B & W, E6, C41 process and I do them by myself.
However I am not familiar with R3 process. And I used to wanna cut it to fit my camera. Then I can shoot and develop as normal film.
It seems that I have to give it up.

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AgX · Mar 26, 2014

There are threads on how to reversal process RA-4 materials.

Konica display film

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