Fine Lines On Negs

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DH_Studio

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Hey guys,

Wanted to ask if anyone knows what might cause thin, sharp lines on my 120 (Mamiya 645afdii) negs. This issue is brand new. The lines are uniform and are *not* dust on the scanner - they're in the negs. It's super subtle on the neg itself, looking directly at them at the right angle you can see them - but just barely. I scanned them and that's where you really see them. I read some other posts about banding but not sure this is that. You can see the lines continue down the whole roll and are pretty uniform. They're also pretty tightly crowded up against each other.

The film is Tri-X processed in D76 1:1 in a stainless steel tank with stainless reels, and Kodak agitation (5 to 7 quick inversions every 30 seconds).

The lines are on the whole reel, when I flipped them in the carrier and rescanned (in an Epson v700) with the emulsion down instead of up they were more subtle, leading me to believe they're on the emulsion side. I know the usual request is to photograph the negs themselves but it's hard to see. You can see them a little bit right over the bright light (I lowered the exposure to make the lines visible - a normal exposure wouldn't capture them at all.

IMG_9551.jpeg


This is what they look like on the actual scans. The shots themselves are a bit underexposed - not sure if that has any relevance - but I purposely darkened these in Lightroom to make the lines more evident.

DarkPath (1 of 1)-3.JPG

DarkPath (1 of 1)-4.JPG


Again...not the scans. I read some other forums about negs with lines on them like this and it opened the floodgates to some just wild guessing. One thing I have found really helpful here on Photrio is that people don't seem to do the random guessing thing as much, and seem to chime in more when they actually recognize an issue and give experienced feedback on how to problem solve.

Thanks!
 
Last edited:

MattKing

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It might be wetting agent residue on the negative.
 

MattKing

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It really, really looks like the results from a damaged or dirty squeegee.
Try redoing the wash (at least a short one) and photoflo steps, and don't let that squeegee anywhere close!
 
OP
OP

DH_Studio

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It really, really looks like the results from a damaged or dirty squeegee.
Try redoing the wash (at least a short one) and photoflo steps, and don't let that squeegee anywhere close!

Alright, thanks Matt, I'll try that. Do you recommend using a squeegie in general or just photo flo and then hang dry?
 

MattKing

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I recommend against squeegees.
It is very easy to damage film with a squeegee.
Some labs use them, and some automatic processors use them, but in those cases the quality of the squeegees are high, they are inspected regularly for even small damage, and they are used with precise technique.
With Photoflo, it is important to dilute it accurately, and to make sure that it can drain easily off the film.
I always first hang the film one way and then use my fingers to "squeegee" off the excess solution from the leader or trailer (not the image area) at the bottom. I then turn the film so that what was at the bottom is now at the top, and hang it from there to dry.
 
OP
OP

DH_Studio

Member
Joined
Dec 7, 2020
Messages
112
Location
United States
Format
Medium Format
I recommend against squeegees.
It is very easy to damage film with a squeegee.
Some labs use them, and some automatic processors use them, but in those cases the quality of the squeegees are high, they are inspected regularly for even small damage, and they are used with precise technique.
With Photoflo, it is important to dilute it accurately, and to make sure that it can drain easily off the film.
I always first hang the film one way and then use my fingers to "squeegee" off the excess solution from the leader or trailer (not the image area) at the bottom. I then turn the film so that what was at the bottom is now at the top, and hang it from there to dry.

Okay, thanks Matt. I'm going to give that a try and nix the squeegee.
 
OP
OP

DH_Studio

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Joined
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Messages
112
Location
United States
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Use Photoflo mixed with distilled water only and no squeegee at all.
I don't touch the film after hanging it to dry. I can't even remember the last time I even had any water spots on dried film.

Thanks, I have the proper dilution and only use distilled water but going to 86 the squeegee and hope that solves the problem.
 
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