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02-09-2012, 08:18 AM   #16
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QuoteOriginally posted by stevebrot Quote
Please explain. I have been using SS reels for years and while I don't fill to the top (I pour by volume based on the nominal capacity of the tank), I can't say I have ever heard that there was any particular hazard with SS vs. plastic reels and over-filling.



Steve
This is speculation, but he might be referring to the need for a small void to help mix the liquid. The air pocket acts like a stirring rod and helps agitate the chemistry. No idea why that would apply more to metal than plastic though.

02-09-2012, 09:29 PM   #17
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QuoteOriginally posted by Paul MaudDib Quote
No idea why that would apply more to metal than plastic though.
Perhaps when using the swirl stick for agitation with a plastic tank/reel rather than inversion?


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02-09-2012, 10:22 PM   #18
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I don't think its shutter travel because looking at the second image, her head is slightly misaligned. Possibly film advance?

Wait a minute, what type of reels are you using?
02-10-2012, 06:59 AM   #19
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QuoteOriginally posted by Clicker Quote
I don't think its shutter travel because looking at the second image, her head is slightly misaligned. Possibly film advance?

Wait a minute, what type of reels are you using?
Slightly misaligned? I don't understand what you mean.

I'm confused. How would a film advance issue cause a line? Frame overlap sure - but a line?

... and I'm using plastic reels - the kind that snap together for processing either 135 or 120.

R

02-14-2012, 01:22 PM   #20
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I don't believe this is a processing issue. You have a very clear line on the neg where the exposure has been greater and the developer has merely developed the more exposed side more as it should in the same way that two negs would be different if one was exposed at say 1/250th and another identical shot was exposed at 1/125th with identical apertures.

It all points to an uneven exposure of the neg so a curtain changing speed halfway across or temporarily sticking would do this.

As far as over filling the tank is concerned this is possible but the effect is to prevent the developer from circulating around the film and giving an even but slightly underdeveloped look. It is what happens if you fill a bottle to almost the top with water and add a colourant dye. Try inversion and see how much the dye moves then do the same with a bigger space in the top of the bottle and watch how much more the dye moves

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02-21-2012, 12:15 PM   #21
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Just to chip in here, I've also been having this problem with my 645N - thought it might have been a light leak with one of the inserts but also got the perfectly straight lines. I'm glad I'm not the only one!
02-21-2012, 01:00 PM   #22
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QuoteOriginally posted by jonny_boy27 Quote
Just to chip in here, I've also been having this problem with my 645N - thought it might have been a light leak with one of the inserts but also got the perfectly straight lines. I'm glad I'm not the only one!
How often does it happen? Every roll? Every tenth? Just curious...

(This 'line-on-the-neg' issue has only happened to me a couple of times in 40 or so rolls.)

R
02-21-2012, 01:04 PM   #23
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Not sure how many rolls, but it's not that often. It happened on the very first roll I put through it, and I've got maybe ten frames affected out of 20 rolls or so - sometimes two frames on a roll but usually just the one. It's just annoying since it always seems to happen to the best shots - there's an otherwise breathtaking portrait of a good friend of mine which has a horrible line right through it!

02-21-2012, 01:08 PM   #24
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Also, to add more info: I've seen this on commercially-developed C41 (fuji minilab); E6 chromes I've put through the Jobo and also inversion-tank developed b&w so I'm pretty sure it's not the processing.
02-21-2012, 01:32 PM   #25
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QuoteOriginally posted by stevebrot Quote
Please explain. I have been using SS reels for years and while I don't fill to the top (I pour by volume based on the nominal capacity of the tank), I can't say I have ever heard that there was any particular hazard with SS vs. plastic reels and over-filling.



Steve
Sorry, I have not been back to this thread. This is with SS reels and tanks.

If there is no air in the tank, the developer cannot circulate. The edges of the reels will cause micro currents causing the edge of the film to develop a different rate as the developer at the center is not really having any agitation. The results is unmistakable--in a print or contact you will see lighter sides to the film image compared to the center.
02-21-2012, 01:34 PM   #26
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That line is just too sharp for it to be lack of agitation or low chemical volume. I would go with Srevebrot here, It can only be the shutter.
You could just try whacking off a load of shots at high speed to loosen it up. Its prob due to infrequent use.
A simple service would cure it for sure though.
02-21-2012, 01:52 PM   #27
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QuoteOriginally posted by westmill Quote
That line is just too sharp for it to be lack of agitation or low chemical volume. I would go with Srevebrot here, It can only be the shutter.
You could just try whacking off a load of shots at high speed to loosen it up. Its prob due to infrequent use.
A simple service would cure it for sure though.
Agreed. Shutter.

After the studio class that I'm currently using it for is over, it'll be on its way to Eric for a proper CLA.

R
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