Unknown 'Black" Paper

[djhopscotch]

I was recently fortunate to receive a few boxes of old Ilford paper, assuming that it is Ilford since it is in Ilford boxes. One of the boxes has a mix a three papers in different plastic sleeves. Two of them are black and white paper that process normal the third is a bit a mystery to me in that it is a glossy paper that appears black. I haven''t tried to process it yet, so I'm not sure if its just heavily faded or it is paper for a process that i am not familiar with. Any ideas?

 

[sidearm613]

Could it be Ilfo/Cibachrome? I have never worked with Ciba as the price and toxicity are too high, so I cannot be for certain, but I seem to remember seeing somewhere that it looks a bit like you describe. Still, I have no idea, and it may be much more likely that it is just really knackered B&W paper.

 

[Aurum]

IIRC Ciba is a sheet material thats more plastic than paper, but its black when unprocessed

 

[nickandre]

Try putting it in c41 bleach. If it turns white then that was silver, if it's still black it's dye, and that paper is very valuable.