กระดาษและผลิตภัณฑ์กระดาษ
เอกสารมาตรฐาน
สหรัฐอเมริกา
TAPPI
T 421 cm-22
Qualitative (including optical microscopic) analysis of mineral filler and mineral coating of paper
2022
16
offline
This method describes procedures which may be used for the qualitative determination and
identification of the mineral constituents of filled and coated papers. Due to the similarity in chemical composition and physical size and shape of some of the various
possible constituents contained in a given paper specimen, more precise quantitative methods may at times be required
for positive identification. ....