In addition to vacuuming I have mounted a small dust collection unit by the enlarger. The unit has a high and low setting which I have it running the night before I get into the darkroom. It picks up some small particles very well and what it misses at least it give the air flow away from the enlarger and neg carrier slot. This is as quoted from the manufacture "The two-stage filter (one foam pre-filter, one electrostatic unwoven polypropylene) removes 93% of dust particles as small as 5 microns, and 84% at 1 micron". Portable Dust Filter System Model #AB260 Retailed through Lee Valley.. It seems to have helped me in our very dry winter months.


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Peter