I used to have nasty dust problems both pre and post exposure. I installed a floor standing Friedrich air cleaner in the darkroom, and, as long as I run it at least twenty minutes before I load film holders or print, dust is no longer a problem. The most I need is a single pass with a soft brush to remove residual dust. The air cleaner seemed like overkill when I first got it, but now I can't image working without it.
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