think black lines on b+w negative

Hi,
I am new to developing B+W negatives and am having minor problems. I am
developing HP5 plus in a spiral tank with ilfosol. I am getting good range
of density and the majority of negatives are good.
I am however seeing a few very thin black lines on the negatives,
predominently on the film at the outer spiral. These are not scratches from
the squeegee as they are not in the direction of the length of the film.
I hope you can give me ideas as to what is the cause.
Thanks for your help.

Regards,

Jon

Jon Downes spake thus:

I am new to developing B+W negatives and am having minor problems. I
am developing HP5 plus in a spiral tank with ilfosol. I am getting
good range of density and the majority of negatives are good. I am
however seeing a few very thin black lines on the negatives,
predominently on the film at the outer spiral. These are not
scratches from the squeegee as they are not in the direction of the
length of the film. I hope you can give me ideas as to what is the
cause.
Thanks for your help.

Light leak from your camera? Hard to tell from your description; any
chance you can post some pictures (scans of prints)? It would help to
see what they look like: are they sharp and distinct, or soft and fuzzy?
Regularly spaced?


--
The only reason corrupt Republicans rule the roost in Washington
is because the corrupt Democrats can't muster any viable opposition.

Jon Downes spake thus:

Hopefully this is enough of the scanned negative to see the problem.
The line is white here but black on the negative. These lines are
rare but distracting. This particular frame has just this line in the
top right of the image, maybe a quarter of an inch or less in length

Thanks for that. One thing, before others pounce on you: you shouldn't
post pictures ("binaries") here, since this is supposed to be a
text-only newsgroup. When I said "post" what I meant was to post it to a
web site and post a link to it here.

About that stuff on your negatives: I'm mystified. Perhaps others here
have seen something like this?

"David Nebenzahl" wrote in message
.com...

Jon Downes spake thus:

I am new to developing B+W negatives and am having minor
problems. I am developing HP5 plus in a spiral tank with ilfosol.
I am getting good range of density and the majority of negatives
are good. I am however seeing a few very thin black lines on the
negatives, predominently on the film at the outer spiral. These
are not scratches from the squeegee as they are not in the
direction of the length of the film. I hope you can give me ideas
as to what is the cause.
Thanks for your help.

Light leak from your camera? Hard to tell from your description;
any chance you can post some pictures (scans of prints)? It would
help to see what they look like: are they sharp and distinct, or
soft and fuzzy? Regularly spaced?


--
The only reason corrupt Republicans rule the roost in Washington
is because the corrupt Democrats can't muster any viable opposition.

"David Nebenzahl" wrote in message
.com...
Jon Downes spake thus:

Hopefully this is enough of the scanned negative to see the problem.
The line is white here but black on the negative. These lines are
rare but distracting. This particular frame has just this line in the
top right of the image, maybe a quarter of an inch or less in length

Thanks for that. One thing, before others pounce on you: you shouldn't
post pictures ("binaries") here, since this is supposed to be a text-only
newsgroup. When I said "post" what I meant was to post it to a web site
and post a link to it here.

Apologies. It wont happen again.
Regards,
Jon


About that stuff on your negatives: I'm mystified. Perhaps others here
have seen something like this?

"David Nebenzahl" wrote in message
.com...

Jon Downes spake thus:

I am new to developing B+W negatives and am having minor
problems. I am developing HP5 plus in a spiral tank with ilfosol.
I am getting good range of density and the majority of negatives
are good. I am however seeing a few very thin black lines on the
negatives, predominently on the film at the outer spiral. These
are not scratches from the squeegee as they are not in the
direction of the length of the film. I hope you can give me ideas
as to what is the cause.
Thanks for your help.

Light leak from your camera? Hard to tell from your description;
any chance you can post some pictures (scans of prints)? It would
help to see what they look like: are they sharp and distinct, or
soft and fuzzy? Regularly spaced?


--
The only reason corrupt Republicans rule the roost in Washington
is because the corrupt Democrats can't muster any viable opposition.

"Jon Downes" wrote

Hopefully this is enough of the scanned negative to see the problem. The
line is white here but black on the negative. These lines are rare but
distracting. This particular frame has just this line in the top right of
the image, maybe a quarter of an inch or less in length

I would wager static electricity: was it cold and dry when the
picture was taken or the film loaded onto the developing reel?

Could also be wet lint - then it would come off with your fingernail.

--
Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics; Informatics; Photonics.
To reply, remove spaces: n o lindan at ix . netcom . com
Fstop timer - http://www.nolindan.com/da/fstop/index.htm

On Mon, 23 Jan 2006 21:21:43 +0000 (UTC), "Jon Downes"
wrote:

Hi David,

Hopefully this is enough of the scanned negative to see the problem. The
line is white here but black on the negative. These lines are rare but
distracting. This particular frame has just this line in the top right of
the image, maybe a quarter of an inch or less in length

Thanks,
Jon


Static. Usually caused by a combination of dry air and the rapid
passge of film through the felted light trap on a film canister.

==
John - Photographer & Webmaster
www.puresilver.org - www.xs750.net

How are you agitating the film? Does the film touch the outer wall of
your developing can? If you're doing inversion agitation then perhaps
this is scratching your film.

nathantw spake thus:

How are you agitating the film? Does the film touch the outer wall of
your developing can? If you're doing inversion agitation then perhaps
this is scratching your film.

No, unlikely.

Of all the ideas so far, static electricity seems the most plausible.


--
The only reason corrupt Republicans rule the roost in Washington
is because the corrupt Democrats can't muster any viable opposition.

"Jon Downes" wrote in message
...
Hi,
I am new to developing B+W negatives and am having minor problems. I am
developing HP5 plus in a spiral tank with ilfosol. I am getting good range
of density and the majority of negatives are good.
I am however seeing a few very thin black lines on the negatives,
predominently on the film at the outer spiral. These are not scratches
from the squeegee as they are not in the direction of the length of the
film.
I hope you can give me ideas as to what is the cause.
Thanks for your help.


Get a 10x loupe and see if there's something embedded in the emulsion. Might
have been some lint in the tank. Static is the other possibility.

Natural Light Black and White Photography
http://mysite.verizon.net/vze76ane/
-George-

On Wed, 25 Jan 2006 16:26:13 GMT, "seog" wrote:


Get a 10x loupe and see if there's something embedded in the emulsion. Might
have been some lint in the tank. Static is the other possibility.

Believe me, it's static. I used to shoot a lot of Tech Pan which could
generate a significant amount of static during re-wind. I has one
entire roll ruined when the shooting in DC. Can you imagine the emount
of static that it would take to flash an image onto a EI25 film ? St.
Elmoe's Fire !

==
John - Photographer & Webmaster
www.puresilver.org - www.xs750.net