กระดาษและผลิตภัณฑ์กระดาษ
เอกสารมาตรฐาน
สหรัฐอเมริกา
TAPPI
T 409 sp-15
Machine direction of paper and paperboard
2015
Historical
4
offline
This Standard Practice describes several procedures for determining the machine direction of most grades
of paper and paperboard. Most of the procedures embody the principle that fibers tend to be aligned in the machine
direction of the sheet, and this alignment produces observable effects. However, the extent of restraint used in drying can
be very important in determining machine direction. ....