Can you identify this film stock?

[trythis]

I have a bulk roller with a heavy lump of this in it. Any idea what it is? I plan to shoot a short roll at a wide EI range and develop in HC110 to test. Ok, and maybe a test in diafine since it is not time specific.

The picture shows both sides.

Thanks

 

[AgX]

It is cine camera or internegative film.
Which does not make you wiser at all...

 

[trythis]

It is cine camera or internegative film.
Which does not make you wiser at all...

Well, a little. Hopefully it responds to b&w developer

 

[railwayman3]

It looks rather like some movie print film (B&W) which I had many years ago to print some B&W transparencies from negs.

 

[Gerald C Koch]

From the shape of the perforations it is cine stock. I could be fine grain positive stock or leader. They look very similar. Without trying to develop it you cannot really tell. Developing would reveal any edge markings. Does a small piece respond to a developer. If not then it is leader.

 

[AgX]

It looks rather like some movie print film (B&W) which I had many years ago to print some B&W transparencies from negs.

Cine print film has a different kind of perforation.

 

[Gerald C Koch]

The BH1870 perforation is standard for negative and intermediate (interpositive / internegative) lab film.

https://en.wikipedia.org/wiki/Film_perforations

 

[trythis]

It does not seem to have an antihalation layer. I have some other film, litho I think, but irs a pale yellow.
I an going to develop tonight si we shall see. I will feel kinda stupid if its leader film and wonder why its in the daylight loader in the first place.

 

[georgegrosu]

The positive black and white is more light yellow.
I see here a little reddish.
In connection with negative perforation can tell you that I had from ORWO positive black and white with such perforation.
Kodak makes positive with negative perforation but to order.

George

 

[trythis]

Well this is a new one for me,
Its Plenachrome. Luckily it is Safety Film.

From the two minutes of research its a 125 ISO orthochromatic film by Ansco, but who knows if that is accurate.

The shots taken in the 25 to 50 EI range look pretty good, but its certainly fogged, a bit. Quite surprised at how decent the negatives are for unknown age, unknown storage conditions. Its worth shooting!

Ok, maybe not, this stuff is nowhere near flat after drying.