Hep please. I need to identify what I am doing wrong

pepeguitarra

pepeguitarra

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After few months of getting very good quality developed films, I am concerned with the way some of the frames in my roll come out (they are closest to the center of the film, never at the extremes of the film.). Can you tell me what am I doing wrong?


Pentax LX by Palenquero Photography, on Flickr
 
Axel100 said:
To me it looks like fault light.
Always the same body?
Click to expand...
Different bodies. I think you are not looking at the problems. If you take a roller and draw aline in the middle of the frame horizontally, you will see the steaks of what seems to be an undelveloped area. It is hard to see unless you click and enlarge the image.


LX-Entrance1 copy by Palenquero Photography, on Flickr
 
Looks like a developing issue.

Since it’s in the middle, loading film properly, agitation, something restricting developer in the middle of the film.

What tank are you using?

Try sacrificing a roll of film or an already developed roll that hasn’t been cut and wind on the reel in daylight to see what happens.
 
Possibly a drying aid like PhotoFlo that was mixed too strong. Possibly Newton Rings from glass negative carrier or scanner glass. Just a couple of thoughts.
 
Thanks Bill and Dogman: I used the Patterson plastic container with plastic reels (easy to load with no problem). However, I may have been using to much Photo Flow lately. I remember being so strict as measuring three threads of the cap, now, I don't measure, just pour it. I am going to try to watch for that. Since were are in the subject of development, what is the best (non-leaking) plastic tank?
 
It looks as if one piece of the film has touched another piece on the reel.

A bent reel that allows the film to touch, or improper loading on the reel with a slight pinch or buckle would be my first guess.

Or, it is possibly faulty film, a coating issue.

Or, if this is a scan using glass, a Newton ring.
 
What happens with too much Photo-Flo?

Too much seems like it'll make a ton of foam, so I probably keep it on the side of barely enough. But it works.
 
Newton rings it is.

Newton rings it is.

I just realized my negatives are OK, there is no such blemish on them. The damage is caused by the scanning. After reading about it in the link below, I realized the negatives are not so flat when I scan them. In fact, the middle of the strip is the one with most sagging and the curvature is more evident there. I am flattening my negatives now by pressing them between heavy books to scan again later on. Thanks everyone. This is a great service.

https://www.lomography.com/magazine/158256-how-to-avoid-newton-rings-while-scanning-your-negatives
 
valdas said:
Looks to me like Newton Rings during scanning...
Click to expand...
+1

I suggest that the OP look at the negs very very carefully with at least an 8x lupe to see if there is any visible trace of these marks on the negs themselves.

This looks like Newton Rings caused by either contacts with another smooth surface (scanner glass, ...) or an "oil" streak. If they are visible on the negs then clean and rescan. If not, simply rescan.
 
pepeguitarra said:
I flattened the negative between two heavy books and scanned again, and voilá: Here is result:

No More Newton's Rings by Palenquero Photography, on Flickr
Click to expand...

I think you still have some of it left - now on the right side of the frame. Maybe try to flip the negative. Using anti Newton glass helps, but I am not sure it is possible in your case (if that's the part of the scanner).
 
pepeguitarra said:
I am going to try to find out what that is. I am not familiar with Newton, other than the fig cookies, and the apple that felt from the tree. :eek:
Click to expand...

Don't forget that he found that colour is a property of light (Newton's Theory of Colour), he was the first to propose that light was made of particles (he called them corpuscles), founded the base of Classical Mechanics (Newton Laws), and invented Calculus (independently invented simultaneously in Europe by Leibniz).

The most interesting thing is that he was born on the day the Galileo Galilei died. Spooky.

Not my favourite physicist/mathematician (of course everyone has their favourite physicist and mathematician :D), but a great non the less.
 
Yeah those are Newton rings from the film touching the scanner glass. I just scan them whichever way up keeps them off the glass and flip them in PS afterwards.
 
michaelwj said:
Don't forget that he found that colour is a property of light (Newton's Theory of Colour), he was the first to propose that light was made of particles (he called them corpuscles), founded the base of Classical Mechanics (Newton Laws), and invented Calculus (independently invented simultaneously in Europe by Leibniz).

The most interesting thing is that he was born on the day the Galileo Galilei died. Spooky.

Not my favourite physicist/mathematician (of course everyone has their favourite physicist and mathematician :D), but a great non the less.
Click to expand...

Great lesson. I have to go back and read some more about him.
 
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