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 What is this dotted line

What is this dotted line for on the filter? : r Cigarettes 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 Maximum yields might improve public healthif filter vents were banned: a lesson from the history of vented filters Tobacco Control Filtered Cigarettes Just Make Smoking Even Deadlier Effect of charcoal containing cigarette filters on gas phase volatile organic compounds in mainstream cigarette smoke Tobacco Control

SKU: 71506202089 · From swgunbroken.com