black dots in cigarette filter pall mall shift filters have these marks on them, several of them have it not just one. is this normal? never seen this before : r/Cigarettes Cigarette filter - Wikipedia
Cigarette filter Wikipedia I took my N30 apart to see what these black dots were. What are they? Mold??? Dust? The new mask filter is completely white. They don't supply new filters for this mask. The use of charcoal in modified cigarette filters for mainstream smoke carbonyl reduction PMC black dots in cigarette filter What is this dotted line for on the filter? : r Cigarettes
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