BS ISO 2470-2:2008
Current
The latest, up-to-date edition.
Paper, board and pulps. Measurement of diffuse blue reflectance factor Outdoor daylight conditions (D65 brightness)
Hardcopy , PDF
English
30-11-2009
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Sampling and conditioning
7 Preparation of test pieces
8 Procedure
9 Expression of results
10 Precision
11 Test report
Annex A (normative) - Spectral characteristics of
instruments for measuring D65
brightness
Bibliography
Describes a method for measuring the D65 brightness of pulps, papers and boards.
| Committee |
PAI/11
|
| DevelopmentNote |
Supersedes 07/30164319 DC. (11/2009)
|
| DocumentType |
Standard
|
| Pages |
18
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This part of ISO2470 specifies a method for measuring the D65 brightness of pulps, papers and boards.
This part of ISO2470 is limited in its scope to white and near-white pulps, papers and boards, particularly those exhibiting fluorescence which promotes the appearance of whiteness. The measurement can only be made in an instrument in which the ultraviolet energy level of the illumination has been adjusted to correspond to the CIE standard illuminant D65 using a fluorescent reference standard.
The source employed in this part of ISO2470 excites almost twice as much fluorescence as the illuminant in ISO2470-1. Consequently, this part of ISO2470 is better suited for measuring the fluorescent contribution to the brightness. However, D65 brightness should not be confused with ISO brightness which closely approximates the brightness of papers viewed under indoor conditions.
NOTE The property called ISO brightness is measured with an instrument adjusted to a much lower UV content than that specified in this part of ISO2470. The measurement of ISO brightness is described in ISO2470-1.
| Standards | Relationship |
| ISO 2470-2:2008 | Identical |
| ISO 4094:2005 | Paper, board and pulps International calibration of testing apparatus Nomination and acceptance of standardizing and authorized laboratories |
| ISO 11476:2016 | Paper and board Determination of CIE whiteness, C/2 (indoor illumination conditions) |
| ISO 187:1990 | Paper, board and pulps — Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples |
| ISO 2470-1:2016 | Paper, board and pulps Measurement of diffuse blue reflectance factor Part 1: Indoor daylight conditions (ISO brightness) |
| ISO 186:2002 | Paper and board — Sampling to determine average quality |
| ISO 11475:2017 | Paper and board — Determination of CIE whiteness, D65/10 degrees (outdoor daylight) |
| ISO 10526:2007 | CIE standard illuminants for colorimetry |
| ISO 2469:2014 | Paper, board and pulps — Measurement of diffuse radiance factor (diffuse reflectance factor) |
| ISO 3688:1999 | Pulps — Preparation of laboratory sheets for the measurement of diffuse blue reflectance factor (ISO brightness) |
| ISO 7213:1981 | Pulps Sampling for testing |
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