Reference number
ISO 9184-4:1990
ISO 9184-4:1990
© ISO 2025
International Standard
ISO 9184-4:1990
Paper, board and pulps — Fibre furnish analysis — Part 4: Graff "C" staining test
Edition 1
1990-12
1990-12
ISO 9184-4:1990
16805
Published
(Edition 1, 1990)
This publication was last reviewed and confirmed in 2021.
Therefore this version remains current.
Abstract
This part specifies the preparation, use and colour reactions of Graff "C" stain. It should be used in conjunction with ISO 9184-1 and, if necessary, with other staining tests defined in ISO 9184-2. Graff "C" stain allows the identification of almost all the common papermaking fibres. However, this calls for a great deal of training and experience. Thus, main applications are: differentiation of chemical, semi-chemical and mechanical pulps, differentiation of kraft and sulfite in hardwood pulps, differentiation of softwood and hardwood pulps (except dissolving grade pulps), differentiation of bleached straw and esparto pulps in softwood pulps.