Used primarily in the manufacture of paper pulp for testing the formation of sheets according to the parameters specified by ISO 5269 / 1. It is also used in the manufacture of paper glued to perform the test of Cobb as directed by the UNE 57-027 and ISO / R 535.
| Ref | Weight gr/m2 | Thickness mm | Absorption in area AFM 20535 (gr/m3) | Absorption Klemm* mm / 10 min. | Ash % |
| 260 | 0.400 | 450 ± 50 | 80 / 75 | < 0.3 |
longitudinal direction / transverse direction