Blue tinges on edges of Ektar 100 120mm film

brianentz · Jul 20, 2021

Just processed my first C41 and I am finding what is definately a blue tinge on the left and right edges of the film. About 1/5 to 1/4 of the edges. It's graduated in and then becomes normal. Could I have somehow exposed the film while it was still rolled? Or is it more likely a matter of poor agitation? I'm using steel reels and inversion tanks. Should I try agitating more or less? Any ideas?

mohmad khatab · Jul 20, 2021

For these reasons, I hate steel tanks because they do not include a stir stick.
While flipping the tank to flip the deflator, what happens?
This is a stainless steel tank, it loses heat quickly and gains it quickly, so when you flip the tank over, the tank loses a small percentage of the temperature because it is flipped with air while it is supposed to be immersed in a warm water bath at a temperature of 38, and it is worth maintaining that the temperature remains constant throughout development time..
When the tank loses a temperature greater than 0.2°C, chromatic aberration occurs.

AgX · Jul 20, 2021

Indirectly lit parts (shadows) tend to have a different hue (skylight vs. sunlight).

(But maybe my monitor is fooling me.)

MattKing · Jul 20, 2021

That looks more cyan than blue, which certainly could be due to exposure from reddish lght.

Nicholas Lindan · Jul 20, 2021

Are the left and right edges of the print also the outside edges of the film?

DREW WILEY · Jul 20, 2021

Need more info. Was a wide-angle lens used? These pics seem to have illumination falloff toward the corners. If shadows off-center were underexposed relative to the central portion, that might easily explain the shift to cyan in those areas. It is characteristic of Ektar unless you correct for color temp errors with a warming filter at the time of the shot. I've explained why numerous times before on other threads. That is what first comes to mind.

koraks · Jul 21, 2021

My money is on uneven illumination during scanning of the film.

John Salim · Jul 21, 2021

120mm film ? .... what's that ?

JS

foc · Jul 21, 2021

Can you post a photo of the neg strip (the same strip as the images you have posted), please?
Something like this.

It might help to eliminate any light leaks or processing problems.

pentaxuser · Jul 21, 2021

Doing what foc has asked may well find the cause but while doing what he asked, it may assist if you were to tell us if only these 3 shots exhibit this bluish/cyan tinge

Thanks

pentaxuser

cramej · Jul 21, 2021

Looks like 645, so left and right edges are edges of the film. I'd guess it's slightly fogged from some light source before or during processing.

MattKing said:
That looks more cyan than blue, which certainly could be due to exposure from reddish lght.

But these are positives, so it would be cyan/blue light.

koraks · Jul 21, 2021

cramej said:
Looks like 645

I don't see it.

cramej said:
But these are positives, so it would be cyan/blue light.

Ektar film = C41 = negative. Cyan cast, if caused by light fogging of the film, would suggest red light. IF that's the cause.

brianentz · Jul 22, 2021

cramej said:
Looks like 645, so left and right edges are edges of the film. I'd guess it's slightly fogged from some light source before or during processing.

But these are positives, so it would be cyan/blue light.

I'm thinking that that may be the most likely explanation. There may have been some fogging from some error while on the reel. Can't imagine how I did that, but that would make sense.

brianentz · Jul 22, 2021

Thanks everyone for your input. For now, I'm going with a light leak during processing. Not sure how that happened, but I'll need to be more careful.

Blue tinges on edges of Ektar 100 120mm film

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