great streaks in the sky
Old 02-07-2019   #1
Pherdinand
the snow must go on
 
Pherdinand's Avatar
 
Pherdinand is offline
Join Date: Jul 2004
Location: by the river called the Gender
Age: 42
Posts: 7,819
great streaks in the sky

hi,
On a few b&w prints i made recently where there's a large uniform grey sky area, i noticed there are streaks starting from the middle of it and continuing towards the edge of the print. It's a minor variation in the density, but visible.
I know it is not an issue with the negative as negative scan and older lab prints i ggot off the neg do not show this. Also, two prints of the same frame show two different "patterns".
Any idea what this is?
I do agitate i think sufficiently; i flip the print a few times in the developer, i rock the tray, and such.

is this "bromide drag" on paper? does that even exist? or is it light leaks? (i have a really dark darkroom but maybe some reflection when the enlarger is on??)
Or is it processing related? exhausting developer? stop bath is messed up?
or something with my fixer??
or am i still not agitating enough?

i get it with amaloco developer, not sure with other types, yet.
Ideas welcome, especially if you recognize what i am describing as something you also encountered (and solved).
__________________
Happy New Year, Happy New Continent!
eye contact eye
My RFF Foolery
  Reply With Quote

Old 02-07-2019   #2
Glenn2
Registered User
 
Glenn2's Avatar
 
Glenn2 is offline
Join Date: Jul 2006
Location: Canada
Posts: 341
A thought, wonder if this could be caused by reflections of stray light from the lens bouncing off something. My Omega D6 has blades built into the negative carrier that allow masking so this doesn’t happen. It’s mostly a problem with high magnification and small crops.

Glenn
  Reply With Quote

Old 02-07-2019   #3
JoeV
Thin Air, Bright Sun
 
JoeV's Avatar
 
JoeV is offline
Join Date: Sep 2006
Location: Albuquerque, NM, USA
Posts: 1,702
Too small of a tray can cause reflected waves during agitation to locally develop part of the print faster than others.
__________________
"If your eye is clear, your whole body will be full of light"

Inventor of the Light Pipe Array
My Blog
My latest book
  Reply With Quote

Old 02-07-2019   #4
mpaniagua
Registered User
 
mpaniagua's Avatar
 
mpaniagua is offline
Join Date: Nov 2011
Location: Tijuana, Baja California, Mexico
Age: 46
Posts: 998
Probably paper issues? Try developing an unexposed sheet and see if it shows the gray area?

Something similar happened to me a long time ago and it turned out to be a paper gone wrong.

Regards
  Reply With Quote

Old 02-07-2019   #5
jim_jm
Registered User
 
jim_jm's Avatar
 
jim_jm is offline
Join Date: Jun 2007
Location: San Diego, Ca
Posts: 264
Are the streaks lighter or darker than the surrounding sky?
An example of what you are seeing would be a help.
__________________
My Flickr
  Reply With Quote

Old 02-07-2019   #6
Pherdinand
the snow must go on
 
Pherdinand's Avatar
 
Pherdinand is offline
Join Date: Jul 2004
Location: by the river called the Gender
Age: 42
Posts: 7,819
Thanks- i will make a photo of an example print.

unexposed paper doesnt show issues, only lightly exposed parts such as cloudless sky, where it is also well visible. Also completely black parts are fine though it mgh just not be that visible in a black area.

The tray is just large enough, i have about half an inch room around the paper only. So it's a good idea. Will try with a smaller print or larger tray.
__________________
Happy New Year, Happy New Continent!
eye contact eye
My RFF Foolery
  Reply With Quote

Old 02-07-2019   #7
Pherdinand
the snow must go on
 
Pherdinand's Avatar
 
Pherdinand is offline
Join Date: Jul 2004
Location: by the river called the Gender
Age: 42
Posts: 7,819
Oh and it is full frame 6x6 enlarged 3x.
__________________
Happy New Year, Happy New Continent!
eye contact eye
My RFF Foolery
  Reply With Quote

Old 02-09-2019   #8
Pherdinand
the snow must go on
 
Pherdinand's Avatar
 
Pherdinand is offline
Join Date: Jul 2004
Location: by the river called the Gender
Age: 42
Posts: 7,819
Ok here comes an example.
Sorry for the brown tone- its only the light. I tried correcting in the pad but then rff doesnt allow me uploading it lol


Any further ideas?
Attached Images
File Type: jpg IMG_0350.jpg (12.3 KB, 21 views)
__________________
Happy New Year, Happy New Continent!
eye contact eye
My RFF Foolery
  Reply With Quote

Old 02-10-2019   #9
Ko.Fe.
Kostya Fedot
 
Ko.Fe.'s Avatar
 
Ko.Fe. is offline
Join Date: Jul 2013
Location: MiltON.ONtario
Posts: 7,109
Is it fast developing? If I place it wrong and short developing I'm getting special effects in even areas.
  Reply With Quote

Old 02-10-2019   #10
Pherdinand
the snow must go on
 
Pherdinand's Avatar
 
Pherdinand is offline
Join Date: Jul 2004
Location: by the river called the Gender
Age: 42
Posts: 7,819
3'30". I think it is rather slow, in my limited experience.

I am rating the too small tray as #1 suspect for now.
Did not do any control tests yet.
__________________
Happy New Year, Happy New Continent!
eye contact eye
My RFF Foolery
  Reply With Quote

Old 02-10-2019   #11
Larry H-L
Registered User
 
Larry H-L is offline
Join Date: May 2005
Posts: 576
Try cleaning your print trays really well, scrub them, especially if you are using metal trays.

Otherwise, perhaps humidity damage to your paper... was it in the fridge and then warmed in a humid room?

Good luck.
  Reply With Quote

Old 02-10-2019   #12
Dogman
Registered User
 
Dogman is offline
Join Date: Oct 2007
Posts: 1,425
A small tray or too low a volume of chemicals (or both) seems a reasonable answer to me.
  Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 04:51.


vBulletin skin developed by: eXtremepixels
Powered by vBulletin® Version 3.6.8
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.

All content on this site is Copyright Protected and owned by its respective owner. You may link to content on this site but you may not reproduce any of it in whole or part without written consent from its owner.