กระดาษและผลิตภัณฑ์กระดาษ
เอกสารมาตรฐาน
สหรัฐอเมริกา
TAPPI
T 430 cm-22
Copper number of pulp, paper, and paperboard
2022
5
offline
This method describes a procedure for determining the copper number of bleached and purified pulp,
paper, and paperboard, except those containing calcium sulfite, zinc sulfide, melamine resin, or other copper-reducing
nonfibrous materials. Papers containing such additives can be tested only if the amount and reducing power of the
added material is known. ....