กระดาษและผลิตภัณฑ์กระดาษ
เอกสารมาตรฐาน
สหรัฐอเมริกา
TAPPI
T 538 om-22
Roughness of paper and paperboard (Sheffield method)
2022
6
offline
This method is a measurement of the air flow between the specimen (backed by flat glass on the bottom side)
and two pressurized, concentric annular lands that are impressed into the sample from the top side. The rate of air flow
is related to the surface roughness of paper or paperboard.