black spots in cigarette filter View of stains from cigarettes that had been smoked with filter ClinMed International Library | Electron

ClinMed International Library Electron Microscopic Analysis of Silicate and Calcium Particles in Cigarette Smoke Tar International Journal of Respiratory and Pulmonary Medicine I opened up a cigarette from curiosity (I dont smoke) I cut the filter part from the tobacco part and saw the upper bit of the filter had black parts and the 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 Dunhill White Spot Shortie black lacquer and gold plate cigarette holder (CH2815), case and filters 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 ?

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