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BS 4420:1990

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by

Method for determination of the Bendtsen roughness of paper and board

Available format(s)

Hardcopy , PDF

Superseded date

31-01-2014

Superseded by

BS ISO 8791-2:2013

Language(s)

English

Published date

31-08-1990

€140.23
Excluding VAT

Committees responsible
National foreword
Method
1 Scope
2 Normative references
3 Definition
4 Principle
5 Apparatus
6 Sampling
7 Conditioning
8 Preparation of test pieces
9 Procedure
10 Expression of results
11 Test report
Annex
A Care and maintenance of Bendtsen testers
B Calibration of capillary tubes and variable-area
     flowmeters
Figures
1 Circuit diagram of test apparatus
B.1 Soap-bubble meter

Describes a method for determining the roughness of paper and board using the Bendtsen apparatus. Applicable to paper and board which have Bendtsen roughness values between about 50 ml/min and 1200 ml/min. Not suitable for soft papers which allow the land to make a significant impression on the surface or for high air permeance papers which allow a significant flow of air to pass through the sheet, or for papers which will not lie flat under the heavy metal annulus. Covers normative references, definition, principle, apparatus, sampling, conditioning, preparation of test pieces, procedure, expression of results and test report.

Committee
PAI/11
DevelopmentNote
Supersedes 88/45969 DC and BS 4420(1969) (08/2005)
DocumentType
Standard
Pages
12
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

ISO 8791-1:1986 Paper and board — Determination of roughness/smoothness (air leak methods) — Part 1: General method

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