NF ISO 2470-2

NF ISO 2470-2

December 2008
Standard Current

Paper, board and pulps - Measurement of diffuse blue reflectance factor - Part 2 : outdoor daylight conditions (D65 brightness)

ISO 2470-2:2008 specifies a method for measuring the D65 brightness of pulps, papers and boards.ISO 2470-2:2008 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 ISO 2470-2:2008 excites almost twice as much fluorescence as the illuminant in ISO 2470-1. Consequently, ISO 2470-2:2008 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.

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Main informations

Collections

National standards and national normative documents

Publication date

December 2008

Number of pages

14 p.

Reference

NF ISO 2470-2

ICS Codes

85.060   Paper and board

Classification index

Q03-039-2

Print number

1 - 04/12/2008

International kinship

ISO 2470-2:2008
Sumary
Paper, board and pulps - Measurement of diffuse blue reflectance factor - Part 2 : outdoor daylight conditions (D65 brightness)

ISO 2470-2:2008 specifies a method for measuring the D65 brightness of pulps, papers and boards.

ISO 2470-2:2008 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 ISO 2470-2:2008 excites almost twice as much fluorescence as the illuminant in ISO 2470-1. Consequently, ISO 2470-2:2008 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.

Replaced standards (1)
NF Q03-039
September 1983
Published document Cancelled
Paper and board tests. Measurement of diffuse blue reflectance factor of paper and board.

Table of contents
  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes et définitions
    2
  • 4 Principe
    3
  • 5 Appareillage
    3
  • 6 Échantillonnage et conditionnement
    4
  • 7 Préparation des éprouvettes
    4
  • 8 Mode opératoire
    4
  • 9 Expression des résultats
    5
  • 10 Fidélité
    5
  • 11 Rapport d'essai
    5
  • Annexe A (normative) Caractéristiques spectrales des appareils de mesure du degré de blancheur D65
    6
  • Bibliographie
    8
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