BS 4420:1990
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by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
Hardcopy , PDF
01-31-2014
English
08-31-1990
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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Superseded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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