Roughness of Paper and Paperboard (Sheffield Method)
纸和纸板的粗糙度(谢菲尔德法)
TAPPI T 538 om-16是对试样(底部有平板玻璃支撑)和从顶部压入试样的两个加压同心环形环之间空气流量的测量。气流速度与纸张或纸板的表面粗糙度有关。
TAPPI T 538 om-16 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.