BS ISO 2965:2019 Materials used as cigarette papers, filter plug wrap and filter joining paper, including materials having a discrete or oriented permeable zone and materials with bands of differing permeability. Determination of air permeability

Equations
Gas flow
Testing conditions
Statistical methods of analysis
Air
Reproducibility
Flow measurement
Calibration
Control samples
Test specimens
Test equipment
Paper
Cigarette filters
Permeability measurement
Leak tests
Specimen preparation
Cigarettes
Cigarette paper
Air permeability
Tobacco
Tobacco testing

Link: BS ISO 2965:2019 Materials used as cigarette papers, filter plug wrap and filter joining paper, including materials having a discrete or oriented permeable zone and materials with bands of differing permeability. Determination of air permeability
Source: BSI Standards