Just hold some paper towels up to sunlight or a lamp and pull two sheets apart. I have allergies so I pay attention to these things. But for allergies I will just sneeze. For darkroom work the results are worse. As noted, Kleenex is even worse. Blow your nose on a sunny day and you will see the dust bomb. The flour sack towels I mentioned are much better, cheap, and re-usable.
Originally Posted by Martin Aislabie