what is the black stuff in cigarette filters

what is the black stuff in cigarette filters dots on filter Wtf this black my filter : r/ Cigarettes pall mall shift filters have

Name: what is the black stuff in cigarette filters dots on filter Wtf this black my filter : r/ Cigarettes pall mall shift filters have
Brand: www.tlh-autoglass.com
SKU: 32250655365
Price: 21.05 USD
Availability: InStock
Rating: 4.0963 (25 reviews)

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 120pc Black Biodegradable Filter Tips, 7mm Etsy The use of charcoal in modified cigarette filters for mainstream smoke carbonyl reduction PMC Why Is My Air Filter Black? Causes for Furnace, AC, and HVAC Filters Turning Dark Quality variations of leachate resulting from cigarette filter recycling as a challenge for its management Scientific Reports

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Clean indoor air makes a measurable difference for allergy relief, sleep quality, and the simple comfort of a home that doesnt smell of mildew or smoke