black spots in cigarette filter WTF is this stuff my filters? : r/Whatisthis I took my N30 apart

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. Filter cigarette Black and White Stock Photos & Images Alamy Dunhill White Spot Crystal Cigarette Filters Pack of 10 Black Swan Shoppe TIL that cigarette filters change color not because they are trapping part of the cigarette smoke, but because they are designed to change color to lead consumers to think that they are Today a black surprise for Jen I cleaned my filter This is the e first time I have such black spot on the filter Do you have any idea ? Marlboro Filter Black

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