Need some help

fastw · Sep 21, 2013

Noticed a few of those lately. I know it's developing problem, but is it badly loaded film or just not enough agitation?
BTW it's Tri-x in RO9 I think. 7 min four turns every min.

Cheers, Wojtek.

ic-racer · Sep 22, 2013

Air bubbles. Try more volume of developer in the tank.

fastw · Sep 22, 2013

will do, ta

Europan · Sep 22, 2013

Too little agitation

darkosaric · Sep 22, 2013

Which developing tank you are using and how many ml of developer was inside? Do you hit bottom of the tank with palm of the hand after agitation to release air bubbles? Also on the beginning of development you agitate 30 sec or just 4 agitations on the beginning?

fastw · Sep 23, 2013

Paterson tank with 500ml and everything apart from 30 sec. Only 4 times.

Huub · Sep 23, 2013

Indeed an agitation problem and I suspect that Tri-X is more suscetable for this then for instance TMY-II. Tri agitating a bit more after a first minute constant agitation and see if that solves the problem.

darkosaric · Sep 23, 2013

Huub said:
first minute constant agitation

Yes. This is probably root cause of the problem. try first 30-60 sec constant agitation.

Regular Rod · Sep 23, 2013

In addition to all the above excellent advice, you might like to try a pre-soak before developing as this will help the developer wet all the film straightaway. Another thing to be careful about is that after use you wash all the tank components very thoroughly, especially the spirals as a tiny trace of wetting agent can cause bubbles too.

RR

MartinP · Sep 23, 2013

In addition to all the agitation scenarios, possibly the spiral has slipped upwards a little during agitation, leaving one end of the film at or near the developer surface. Make sure the reel is at the base of the centre column and, if necessary, wrap a rubber-band around the column to hold the spiral in place at the lowest point.

Neal · Sep 23, 2013

Light leak?

Neal Wydra

fastw · Sep 24, 2013

I think the spiral moving up a bit on the column sounds like the most likely cause. Will have to be more careful next time.

Thanks everyone. W

Rick A · Sep 24, 2013

Doesn't the Paterson tank require 550ml of fluid? Possibly the OP is not using enough developer, and/or the reel is sliding up the center post.

Need some help

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