กระดาษและผลิตภัณฑ์กระดาษ
เอกสารมาตรฐาน
สหรัฐอเมริกา
TAPPI
T 519 om-22
Diffuse opacity of paper (d/0 paper backing)
2022
6
offline
This method provides a measure of diffuse opacity (paper backing) of white and near-white papers, previously known as “printing opacity.” The method may be employed for colored papers on condition that their reflectance (paper backing) is greater than 20% and their diffuse opacity (paper backing) is greater than 45% (1).