black spots in cigarette filter I opened up a from curiosity (I dont smoke) I cut the part from the tobacco part and saw the upper bit of the filter had parts and the Black Specks Or Carbon Dust
Black Specks Or Carbon Dust in Water? Here's Why QWL ClinMed International Library Electron Microscopic Analysis of Silicate and Calcium Particles in Cigarette Smoke Tar International Journal of Respiratory and Pulmonary Medicine pall mall shift filters have these black marks on them, several of them have it not just one. is this normal? never seen this before : r Cigarettes The Pre Roll Experts' Guide to Filter Tips Custom Cones USA
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