Main informations

Collections

National standards and national normative documents

Publication date

September 1983

Number of pages

3 p.

Reference

NF Q03-039

ICS Codes

85.060 Paper and board

Classification index

Q03-039

Print number

1 - 01/08/1984

International kinship

ISO 2470:1977

Replaced standards (1)

Q03-039

October 1971

Standard Cancelled

Measurement of diffuse blue reflectance factor of paper and board (brightness).

Standard replaced by (2)

NF ISO 2470-1

November 2009

Standard Cancelled

Paper, board and pulps - Measurement of diffuse blue reflectance factor - Part 1 : indoor daylight conditions (ISO brightness)

ISO 2470-1:2009 specifies a method for measuring the diffuse blue reflectance factor (ISO brightness) of pulps, papers and boards. ISO 2470-1:2009 is limited in its scope to white and near-white pulps, papers and boards. 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 illuminant C using a fluorescent reference standard.

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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