Weird exposure on 120 film borders

[Robert Taetzel]

Hello,

I just shot a roll of TMY @ 800 (expiry may 2027) the other day to test a newly bought used A12 Hasselblad magazine.
Developed in XT-3 1+1 at 20C for 9:15min, with first minute of agitation and afterwards every 30s 2 agitations.

The negatives themselves look fine. But there are these weird exposed wave parts on the borders of the film. They seem to be more pronounced towards the end of the roll (right).

Might this be a light leak on the roll itself? That I did not wrap it tightly enough when taking out the film?

Thanks for the help

 

[koraks]

Might this be a light leak on the roll itself? That I did not wrap it tightly enough when taking out the film?

Yes, that's possible. In fact, I'd consider that the most likely cause. Also, light piping due to direct exposure of the rolled-up film can play a role.

It's not something that would worry me as long as it doesn't extend into the image frame.

Oh, welcome to Photrio!

 

[John Salim]

Slightly loose roll.
As Koraks says, it's not really a problem, but make sure the roll is tightly taken up, and kept hold of when removing exposed rolls.

 

[loccdor]

The looseness of the roll can be affected by the springs next to the spools. Sometimes it helps to bend them slightly toward the spool if they've relaxed over time.

 

[MCB18]

This is perfectly normal. The edges of 120 film are not 100% light tight in all cases. Especially if you constantly switch manufacturers of 120, as backing paper/spools are not 100% the same size. As an example I’ve personally seen, If you shoot Kodak after you shoot Ilford (meaning that the roll of Kodak is rerolled after exposure on an Ilford spool) there is a very slight difference in the width of the spool and/or backing paper that leads to a very small gap between the paper and spool that lets a small amount of light hit the edge of the film. It shouldn’t affect the negatives.