Below about 180gsm the drum starts lifting fibres off the sheet and depositing them back onto the master. You see it first as a faint speckle in solid areas, and by sheet thirty it has become a texture you did not ask for.
- 120gsm — fine for single-colour text, unreliable for solids
- 180gsm — the practical floor for two-colour work
- 220gsm — what we standardised on
- 300gsm — beautiful, and it jams