WPI-g-00080350–100 g/m²Virgin kraft61% confidence
Black Marble Composition Notebooks.
Stationery paper grade. Permanent ID WPI-g-000803 — verified, source-traced, free.
GSM 35
35g/m²
lighter
GSM 50 · this
50g/m²
WPI-g-000803 · standard
GSM 80
80g/m²
heavier
01
Canonical specification
Basis weight
50–100g/m²
Fiber source
Virgin kraft
stationery
Paper type
stationery
Confidence
61%
source: wpi
WPI ID
WPI-g-000803
Slug
black-marble-composition-notebooks
Last updated
2026-04-18
GSM range
50–100g/m²
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