Uneven Development

Perhaps somebody could explain the development marks between the rocks on this image. 120 Acros film in Rodinal 1:125 stand for 1 hr after some initial agitation. This is the last image taken and so its in the middle of the spiral when loaded. The other negs have less clear sky so not as obvious as this one. This is the first time Ive developed 120 roll like this so, but it was recommend so I gave it a try, perhaps to normal methods.

Thanks

Looks like a classic case of bromide drag from lack of agitation. It is more evident in areas of most exposure from exhausted developer containing many silver halide crystals slide down the face of the film.

Rick

Shane,
I agree with Rick. I would suggest that if you want the benefits of stand development and to control this problem you might try a gentle agitation at 20 minutes and again at 40 minutes. I've never done stand that long but my general rule is no initial agitation and then two agitation cycles during the full time. I have experimented with stand times of as long as 25 minutes and this method works well for me. Good luck.
JOHN

Thanks, I thought it would be something as simple as that. Normally I would have developed more along the lines you describe but decided to try this other method. Won't do that again.

Shane,
Nice shot, Hope you have a back up on large format??????
Pat

ralnphot said:

Looks like a classic case of bromide drag from lack of agitation. It is more evident in areas of most exposure from exhausted developer containing many silver halide crystals slide down the face of the film.

Rick

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I'm with Rick. It's bromide drag.

I've never had uneven development in an hour Rodinal stand (all 1+100 - full stand no agitation after 1 minute of initial hard agitation).

I've also done 1+200, 2 hours without problems.


Never done Acros, but have other T-grain films.


I get really bad uneven development in Rodinal when adding ascorbate and borax as per unblinking eye for stand, though it is always streaking across the film from the sprocket holes.. not in heavy exposure areas. Have this happen in all other developers when there is no agitation apart from Rodinal, usually not a problem or only very mild on 120.. wonder why this is.

I was getting that problem too with Rodinal when I started with the initial 1 minute of agitation and then 59 minutes w/o any agitation. I went to about 5 seconds agitation at 30 minutes, and have still had the problem a little bit, and will be going to 1 minute initial, 5 sec @ 20 min, and 5 sec @ 40 min. on my next round of developing. I think it kind of depends on the film though, too, since I haven't had a problem with Fomapan 100 or 400 at all by using the one agitation halfway through, but last night I had issues with a roll of 35mm TMY.

Maybe it's T-grain films?

Though I do 1+100 stand with colour films no problem.. no agitation at all after initial..

come to think of it, I believe that most of my problems have been with T-grain film. Right around when I started w/ Rodinal, I was working my way through a bunch of rolls of Tmax 100, 400, and 3200 that I bought, and was having quite a few problems with streaking from the sprocket holes. I've done some rolls of Tri-X and Arista Premium and .EDU without problems, I think. I've also done color film in Rodinal, and haven't had the problems either. I never really thought of it being the T-grain film, just thought my method was messed up. Time to get out the negatives and have a look through them I guess.

I just looked up my Fuji Acros shots - they were all pure stand after initial agitation - no problems with them (apart from being boring), but the thing is - they were Rodinal 1+200/1:200, 1 hour.

Examples:

SMBooth's strecks show up mostly in the even sky areas ,that might make any streaks and uneven densitys more noticable.

Your right in that respect Mike, only the shot with the expanse of sky is showing any noticeable effect, as explained by Rick. I have a roll of HP4 (yes HP4) that i might go and expose just to process it the same way and see what happens, in fact I will cut it in half and do 1 as total stand and the other with some minor agitation as DLM does it. First I need to fix the light leak you see on the RHS.

Shane

largeformat pat said:

Shane,
Nice shot, Hope you have a back up on large format??????
Pat

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Ah I reckon he had a 5x4 pinhole on hand additional to the 6x12. I was there with him getting a compressed scene on 6x6 pinhole. Those "rocks" (what a terrible injustice to call them that!) have a long history with me. Great place to go, but the weather was against us on this occasion: sunrise and sunset here is just too good for words! I like this 'stretchy' image despite the technical glitches.

The rocks have been photographed by serious photographers using anything from 35mm, digital, Hassies, large format and ultra large format. But outside of photography, very few people know of the serious imaging potential that side of the mysterious Melville Caves. Actually, I think the next APUG Melbourne gathering should be a weekend affair at Melville Caves to give those cobwebbed minds and cameras something serious to bite onto.

EDIT — History 101: There are two places called Melville Caves in Victoria: this one, near Inglewood and the other within the Mount Arapiles-Tooan State Park 33km west of Horsham in the Wimmera. The naming follows that of Captain Melville, a laconic bushranger who used both locations to hide out and plan his unwelcome heists on Cobb & Co coaches travelling the goldfields.

I'd like to come to Melb..

Athiril said:

I'd like to come to Melb..

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"Welcome to my lair", said the spider to the fly...

OK, pack your boxes, portmanteaux and bags.
I think we'll meet-'n'-greet again in June.
PS: Bring your camera...

Does my phone count as a camera?

No shame in using it for a grab shot of indignant moments. Marvellous things...