Published
This part specifies the preparation, use and colour reactions of Lofton-Merritt stain. It should be used in conjunction with ISO 9184-1 and, if necessary, with other staining tests defined in ISO 9184-2. The Lofton-Merritt staining test is applicable to the qualitative and quantitative differentiation of unbleached and bleached softwood chemical pulps, unbleached kraft and sulfite in softwood pulps, unbleached semi-chemical kraft and sulfite pulps.
PUBLISHED
ISO 9184-5:1990
90.20
Standard under periodical review
Apr 15, 2026
Paper, board and pulps — Fibre furnish analysis — Part 5: Lofton-Merritt staining test (modification of Wisbar)
90.20 Standard under periodical review
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