Sharp increase in edge desnity.

[GraemeMitchell]

Sharp increase in edge density.

As usual I'm stopping in to ask you guys for a little help. Shot some TX 35mm at 200, developed in Rodinal 1+50 as per Don Cardwell's recommendation on this forum: 25 min, 30 sec initial agitation and then 2 inversions each 5 mins thereafter. I'm using stainless reels and tanks. The 2 inversions were very light. The negs were a bit thick, but I think that my water may have been sitting around 70 instead of 68 (summer tap water). No biggie.

After running the film I found many of the negs have a density increase around the edges, or maybe they all do but in some it's just very noticeable. I'll attach a scan from the contact so you can get an idea. It's easy to see in this image on the bottom and sides of the frame.

My guess is something is going wrong with my agitation pattern b/c I processed some rolls shot at 800 during the same time with "normal" agitation and there was no evidence of this edge density increase.

I'd rather get it right next time, so any help is appreciated. Thanks1

 

[Dave Krueger]

Wow! "Edge" effects.

 

[GraemeMitchell]

Lol.

 

[argus]

That has nothing to do with the negative but is due to the fact that you printed the black border.
I get the same effect when doing this. Your scan also shows it at the top of the print.

The increased edge effect when using Rodinal, the better nomination escapes me at the moment, is more likely to appear IN the negative than at the borders of it.

G

 

[GraemeMitchell]

I can see an increase of density on the negative into the frame, on some it bleeds a bit into the picture as a gradient, though only very lightly.

So you're saying this is common with increased time decreased agitation. If so: boo.

 

[Dave Krueger]

I tend to think that it's very difficult to analyze any image characteristics based on a low res JPG. The increased density around the edge of the frame is definitely pronounced if it can be seen at that degree of enlargement and resolution.

Just off hand, it does indeed seem like an effect of the unused developer activity from the unexposed edges bleeding into the picture area. If there were any sharp edged areas inside the image with as much contrast as there is at edge, it might have been visiible there as well.

But I'm not the authority on this kind of stuff. The edge effects I've seen are very subtle. This is almost like an exagerated digital "sharpening" effect. I would repeat the experiment with more frequent agitation and see if it goes away.

 

[argus]

So you're saying this is common with increased time decreased agitation.

Where did I state that?

If so: boo.

I was only trying to help but you just proved your non-appreciation.

Thanks for nothing. The ignore list gets longer.

G

 

[GraemeMitchell]

Argus, no no, you took everything the wrong way, man. Settle down. Sorry if I was dry and it came off as negative or unappreciative. I'm only trying to understand what's going on here, since I've no experience with reduced agitation.

Dave, the negs are fine in the frame, as far as I can tell there's hardly any edge effects going on. Their sharp negs, but just rodinal sharp, not stand development sharp. Whatever is going on is taking place just on the outer edge.

I'll play with the agitation. Being on the extremity of the frame it's only a very slight crop. But it's nice to avoid these things.