Yet another mystery film nightmare!

[Llamarama]

Hello everyone, I got a bulk loader the other day, and it was still half full of film! Spooled out a foot of it and developed it in black and white, got a totally black film apart from where it had been exposed to light, where it was clear. It also had "Kodak Safety Film" along with a 1967 date code along the edge, albeit very thin.

Decided it could be some kind of colour slide stock and decided to soup a short test roll in cold C-41 as I have no E6 to play with (Yet... One day...) and the whole film came out clear, as if the emulsion had just dissolved off. I didn't use a stop bath (Just used water) and the chemicals were relatively fresh.

So I'm thinking it could be some derivative of Kodachrome, but there was no remjet...


Any ideas what this film could be? I need to satisfy my curiosity now, even if the film is useless.

 

[Dr Croubie]

Hang on, in B+W chems, the bit that was exposed to light was clear, and the other bit was black, is that around the right way?

 

[JRoosa]

We used to have a B&W slide film for making pre-PowerPoint presentations when I was in grad school.

I forget what it was called. Pretty sure is was a Kodak product.

J.

 

[Llamarama]

Dr Croubie - yeah thats what it's like, pretty odd.

JRoosa - That's Kodak Rapid Process Copy, a whole different animal and one of my favorite films!

 

[Dr Croubie]

Dr Croubie - yeah thats what it's like, pretty odd.

That's weird, there are only two things that I know of that do that in regular B+W chems.

One is Harman Direct Positive Paper.
The other is a 42" roll of Agfa Direct-Positive film that I've got (and have still never played with).

Everything else that operates like a reversal goes through a much convoluted process to get there, with developing and chemical/light fogging, re-hal bleaching and redeveloping and all that.