WPI-g-000612150–300 g/m²Virgin bleached chemical pulp (typically…50% confidence
Back sizing photo paper.
Printing paper grade. Permanent ID WPI-g-000612 — verified, source-traced, free.
GSM 135
135g/m²
lighter
GSM 150 · this
150g/m²
WPI-g-000612 · standard
GSM 180
180g/m²
heavier
01
Canonical specification
Basis weight
150–300g/m²
Fiber source
Virgin bleached chemical pulp …
printing
Paper type
printing
Confidence
50%
source: wpi
WPI ID
WPI-g-000612
Slug
back-sizing-photo-paper
Last updated
2026-04-18
GSM range
150–300g/m²
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