Color Paper Top Emulson Layer

... so if you take a piece of the unprocessed paper and put a large drop of water on it - with a little rubbing a layer actually rubs off?

You do not need to rub the water, the water turns blue by itself. Almost anyone who processes Fuji paper should know it....

If I hold a piece of Fuji paper in my wet hand, my fingers turn blue quickly.

See: http://www.docstoc.com/docs/98263147...SUPREME-_ltNEW

Scroll down to 17. Paper Structure and you will see the paper layers exactly as PE described them.

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Originally Posted by RedSun

You do not need to rub the water, the water turns blue by itself. Almost anyone who processes Fuji paper should know it....

If I hold a piece of Fuji paper in my wet hand, my fingers turn blue quickly.

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That is dye coming OUT of the paper. No layer is being washed OFF.

The layer structure diagram I referenced shows the overcoat remains in place after processing.

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Originally Posted by RedSun

The blue top layer of Fuji paper is not part of the Dye. It is washed away in pre-wash. It appears to be protective coating, and indicator of the emulsion side of the paper. It is mentioned somewhere that I can't remember. This is the main reason that I'm asking.

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Why would you need a dye layer that indicates which side up, on a material that is intended to be in complete darkness until after it's processed. If it's a protective layer, it makes more sense to have it completely clear, so that it does not affect the colour balance. Now if they are trying to correct some aspect of the colour balance, they could put a colour layer on top, which would wash out in processing.

If you know PE's real name, which escapes me at the moment, a lot of the patents for this stuff have his name on them, so I wouldn't argue with the guy, he knows a lot more about this stuff then you or I do.

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Originally Posted by wogster

If you know PE's real name, which escapes me at the moment, a lot of the patents for this stuff have his name on them, so I wouldn't argue with the guy, he knows a lot more about this stuff then you or I do.

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Mowrey

No one answered me as to why the DYE would come out during pre-wash? It does not make sense. So it is not dye.

Have you guys used any Fuji paper?

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Originally Posted by RedSun

No one answered me as to why the DYE would come out during pre-wash? It does not make sense. So it is not dye.

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It's NOT an imaging dye - it's there for sharpness during exposure (as PE said). It's designed to come OUT (note I do not say OFF) during processing (as PE said). It's not part of the image formation proces.

One or more those "guys" have been using, and doing (or supervising and/or reviewing) scientific comparative tests, of Fuji and other non-Kodak materials for decades, as part of their work for Kodak, and on their own.

They designed this sort of stuff!

Quote:

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Originally Posted by RedSun

No one answered me as to why the DYE would come out during pre-wash? It does not make sense. So it is not dye.

Have you guys used any Fuji paper?

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A dye not being fixed in place against a particular solvent doesn't make it not a dye.