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What did I do wrong? Neopan 1600, DD-x

Except that it doesn’t come off with canned air, a brush, or a rinse. Sand paper works, but seems to ruin the negative?

Dust on wet emulsion will stick like gum. Anyways, does the pattern of crud differ from frame to frame? If it doesn't, I'd examine the scanner.
 
Dust on wet emulsion will stick like gum. Anyways, does the pattern of crud differ from frame to frame? If it doesn't, I'd examine the scanner.

The pattern is different on each frame.

The consensus seems to be that it is dust.

How do I create a dust free environment to dry in?
-Jim
 

Times please?
 
The pattern is different on each frame.

The consensus seems to be that it is dust.

How do I create a dust free environment to dry in?
-Jim

A clean environment will give you cleaner negatives. Mopping the floor and dusting everything is good, but shouldn't be done the same day you process your film. What can be done before hanging to dry is let some hot water flow. It will humidify the air and any dust will likely settle because of it.
 
Slow But Fresh

Times please?

Working with Acros 120 and a 500ml fixer
volume, 16ml of rapid concentrate, about
12 minutes.

The concentrate weakened over time so
switched to 1:24, 20ml, one-shot. About
10 minutes. Times will vary depending
upon film.

Temperatures, 73F +/- some little.
Agitation, a full minute at start then
a few inversions each minute.

My volume is only a few rolls a year so
for a 'concentrate' which lasts and lasts
I've switched to sodium thiosulfate.
Times about the same. Dan