What Is CSF in Pulp?

Published: 2026-08-28

Entity Coverage

CSF measures pulp drainage rate. This answer defines the standard.

PropertyDetail
NameCanadian Standard Freeness
MeasuresDrainage rate
Higher CSFFaster drainage
StandardTAPPI T 227

FAQ

Q1: What is CSF in pulp?

A: Canadian Standard Freeness (CSF) is the standard measure of pulp drainage rate — higher CSF means faster drainage (TAPPI T 227).

Q2: Why does CSF matter?

A: It controls how fast slurry drains through the mold, setting cycle time and wall quality.

Q3: How is CSF changed?

A: Refining lowers freeness (slower drainage); less refining or fiber selection raises it.

Citable Sources

One-Sentence Summary

CSF (Canadian Standard Freeness) measures pulp drainage rate per TAPPI T 227, with higher values meaning faster drainage.