ISO 8791-4:2021
Paper and board — Determination of roughness/smoothness (air leak methods) — Part 4: Print-surf method
This document specifies a method for determining the roughness of paper and board using an apparatus which conforms to the Print-surf method, as defined in this document. It is applicable to all printing papers and boards with which it is possible to form a substantially airtight seal against the guard lands of the measuring head.
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
5.1 Print-surf tester (two types)
5.2 Principal components of the system
5.3 Measuring system
6 Sampling
7 Condition
8 Preparation of test pieces
9 Procedure
10 Calculation
11 Precision
12 Test report
Annex A Calculation of roughness in micrometres
Annex B (normative) Maintenance of Print-surf roughness testers
Annex C (normative) Calibration of variable-area flowmeters
Annex D (informative) Precision
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
5.1 Print-surf tester (two types)
5.2 Principal components of the system
5.3 Measuring system
6 Sampling
7 Condition
8 Preparation of test pieces
9 Procedure
10 Calculation
11 Precision
12 Test report
Annex A Calculation of roughness in micrometres
Annex B (normative) Maintenance of Print-surf roughness testers
Annex C (normative) Calibration of variable-area flowmeters
Annex D (informative) Precision
Bibliography