What is this film?

DonW · Mar 30, 2022

This is all I have. And yes I will put some through a camera at some point to see if there are any edge marks but there is no point if it's colour stock. If it's colour I will shoot some and take it in for development at a lab.

Batch number: 24ehw7x01

Marcelo Paniagua · Mar 30, 2022

Probably a ECN-1 film or any other motion picture film, due to the sprocs holes.

DonW · Mar 30, 2022

Will it work in a 35mm film camera?

NB23 · Mar 30, 2022

Polypan-f

UnderwoodPhoto · Mar 30, 2022

Standard BH holes. This is black n white film. If it were ECN would be black/brown, c41 light brown/dk brown.

DonW · Mar 30, 2022

NB23 said:
Polypan-f

Have you used this film?

DonW · Mar 30, 2022

Ok, with this info I will load it into a cassette and give it a try. Should be interesting if nothing else.

Sirius Glass · Mar 30, 2022

For the best results, shoot it with the lens cap on and then over develop to compensate for the under exposure.

NB23 · Mar 30, 2022

DonW said:
Have you used this film?

Sure. Bad film, but interesting because of its lack of antihalation layer. Lots of ghosting.
No edge markings iirc.

koraks · Mar 31, 2022

NB23 said:
Polypan-f

Statistically a good guess, although you can never be sure.

NB23 said:
Bad film, but interesting because of its lack of antihalation layer. Lots of ghosting.

Yeah, that pretty much sums it up. Also, effective ISO something like 32 or 50 on a good day, but surprisingly grainy for its speed. Very steep curve as well. As you said, technically a bad film; aesthetically it can sometimes work. But I still got rid of the big roll I used to have.

Don_ih · Mar 31, 2022

Develop some without putting it through a camera. No point trying to use it if you don't know its speed. That said, it may have no edge markings. Develop in rodinal 1:25 for 20 minutes - that should overdevelop pretty much any film and show the edge markings.

DonW · Mar 31, 2022

Just developed a quick test. Rodinal 1:50 for 13 minutes as per Massive Development chart. Shot it at 50asa and then increased the exposure by one stop until I ran out of f stops. I will wait until the film dries before making any final judgements but initially it looks like the optimal asa is around 70. So 50 is close enough. However even at 100asa it looked good. Once it dries I will scan it tomorrow and see what kind of tonality and grain I get.

I will shoot another test and develop with PyroCat-HD and see what shakes out there.

I have 600 meters of the stuff! There is no way I will be able to shoot it all before I go to the big darkroom in the sky. I think it might be good for kids learning black and white film though.

Or I can sell it to Cinestill for $5 a meter and they can pass it off as some kind of hipster film lol.

Cholentpot · Mar 31, 2022

DonW said:
Just developed a quick test. Rodinal 1:50 for 13 minutes as per Massive Development chart. Shot it at 50asa and then increased the exposure by one stop until I ran out of f stops. I will wait until the film dries before making any final judgements but initially it looks like the optimal asa is around 70. So 50 is close enough. However even at 100asa it looked good. Once it dries I will scan it tomorrow and see what kind of tonality and grain I get.

I will shoot another test and develop with PyroCat-HD and see what shakes out there.

I have 600 meters of the stuff! There is no way I will be able to shoot it all before I go to the big darkroom in the sky. I think it might be good for kids learning black and white film though.

Or I can sell it to Cinestill for $5 a meter and they can pass it off as some kind of hipster film lol.

600 meters?

Hello my new best friend.

markjwyatt · Mar 31, 2022

Sirius Glass said:
For the best results, shoot it with the lens cap on and then over develop to compensate for the under exposure.

Siriusly?

Dusty Negative · Apr 1, 2022

markjwyatt said:
Siriusly?

Stand development only.

DonW · Apr 1, 2022

So here is an equivalent to 8x10 enlargement of the mystery film. I developed in in Rodinal 1:50 for 13 minutes as outlined above. As I would expect from Rodinal, it's grainy and probably more grainy than I would expect from a 25asa film. However it's not objectionable for certain applications. May next experiment will be to develop it in PyroCat-HD. The neg showed a good range of tones from blacks to whites. The shadows didn't go to black and the whites didn't get blown out. I will have to find someone locally that can shot a roll and develop it in Extol. I have some Microphen I will try as well. I suspect this film was used in police applications as it is quite sharp.

The house in the middle of the frame is white and the coverings on the deck are white with a light gray strip. While it was pretty sunny the north sky had darkish clouds.

Sirius Glass · Apr 1, 2022

Sirius Glass said:
For the best results, shoot it with the lens cap on and then over develop to compensate for the under exposure.

Dusty Negative said:
Stand development only.

Opps, I should have included that!

DonW · Apr 1, 2022

Sirius Glass said:
Opps, I should have included that!

Why do you even bother?

MultiFormat Shooter · Apr 1, 2022

DonW said:
Just developed a quick test.

Did it end-up having any edge markings? The sample you included, of the houses, certainly looks usable.

grat · Apr 1, 2022

DonW said:
Why do you even bother?

If you don't laugh at life, you'll never get out alive.

DonW · Apr 1, 2022

No edge markings.

Craig · Apr 2, 2022

How did you end up with 600 meters of film? Is it all on one roll? That must be a huge roll!

MultiFormat Shooter · Apr 2, 2022

DonW said:
No edge markings.

Interesting, thanks.

DonW · Apr 2, 2022

Craig said:
How did you end up with 600 meters of film? Is it all on one roll? That must be a huge roll!

It is huge! And heavy. All one roll.

DonW · Apr 12, 2022

As promised here is a shot developed in PyroCat-HD 1:1:100 for 9 minutes. I can not see any staining from the Pyro which is interesting in itself. The negs are full tone and minimal grain for a 35mm. In PyroCat-HD I would rate it at 32 rather than 50. That's interesting too as I have never experienced a loss of ISO with PyroCat-HD.

The image below was taken on a very bright day and the main subjects were very light in colour to stark white.

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What is this film?

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