Graflex.org

[primus96]

I have been encountering some marks that could be uneven developement or (please God no) a bellows leak.
The marks look like localised extra density. It may be down one or both long edges of the negative. The sheets stand vertically in my Fink-Roselieve tank.
Anybody else using one of these tanks encouter this problem?
Is this due to a agitation problem?
I wondered if I only loaded a max of six sheets, thus keeping a double gap between the sheets it might eliminate the problem.
I am not holding the tank the wrong way. You can tell by the position of the spout & air vent that as you agitate side to side agitation effect moves between the sheets of film.

[45PSS]

Uneven developement. Simular as to what happens in a Federal or Yankee tank http://www.adorama.com/DKTY45.html which are simular to yours. More developer movement along the edges than across the rest of the film surface. Corrected by modifying your agation technique. Other experenced users may be able to suggest techniques.

Bellows leaks at the film plane-dense streak from edge toward center of frame in a V shape or simular. Film holder light leaks simular.

Bellows leaks (pin holes)- act like a pin hole camera causing extra images to be superimposed on the main lens image.
Lens board light leaks simular.
_________________
The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.

[clnfrd]

A bellows leak can easily be found by shining a flashlight into the rear of your camera in a dark room. Extra density along the long edges of your negatives could be light leaking along the edges of your film holders if you don't carefully remove and replace the dark slide. Exerting too much outward pressure while pulling the slide along with weak springs on your camera's back can cause this.

I've often cured uneven development problems by using a more dilute developer solution and increasing development times all the while increasing the agitation. Fred.

[primus96]

I reckon this is uneven developement. What is the solution. To agitate more often but in a very gentle fashion.
Would having a full tank make any difference?

[45PSS]

[primus96]

I use R09, the original Rodinal recipie diluted 1:50. I have looked at my stored negatives and found others with this marking.
I usually agitate continuously for the first minute, banging the tank on a folded towel to free trapped air bubbles. Therafter 15secs every minute, in one single period of agitation.

If this is a common problem for users of this type of tank: What did you do to avoid or reduce the chances of it occuring? Ought I to agitate very gently, at say the top & bottom of each minute. By gentle agitation I mean a single side-to-side rocking motion.

My last lot of negatives came out well and they had not been agitated so strongly.
Is the problem likely tobe from the developer moving about too much?
I can always do a full load of twelve sheets and apply a gentler agitation technique if that is what is successful for you.

[45PSS]

I switched to the JoBo tanks as I never reall got the agation technique worked out because I got tird of the chemicals sloshing out of the vent, pour spout, and from around the edge of the lid reguardless of how I held and tried to seal them.

Others have posted simular types of conserns both here and on Photo.Net.

You may have to experiment with agation technique until you get consistent results. I think the gentler approach is good and every 30 seconds for 5 to 10 seconds may be in order also. You may want to go in a somewhat eliptical pattern instead of just back and forth in the direction of the film.

I just did a search for "yankee" and got several posts for daylight developement including this one:
http://www.graflex.org/helpboard/viewtopic.php?t=889&highlight=yankee
Charles
_________________
The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.

[sobahguy]

[primus96]

The thread reccomended suggests that if you hold a Fink-Roselieve tank with the filler at 5 o clock & the spout at 11 as I do usually. They suggest agitate by a movement away from and back to my body NOT side to side like I have been doing.
I do have some sheets for developement. They are of the ancient Ansco Isopan and modern Maco Print Film. I will amend my technique accordingly and let you know of my results.

[45PSS]

[Jim23]

I have tried the F-R and Yankee cut film tanks over and over without consistent success. I have complete success with 2 1/4 x 3 1/4 or 4 x 5 with open hard-rubber tanks and good old stainless hangers following the lift-tilt agitation method described in many textbooks. I use the 1/2 gallon tanks with HC110B or D76, stop, and fix and do all the work with the lights out, no more than six sheets at a time.

Somewhere in these posts - someone indicated complete success with a Yankee tank - I will try it one more time.....I sure would like to do more than 6 sheets at once.

[45PSS]