ISO 2470:1999 PDF

Scope: This International Standard specifies a method for measuring the diffuse blue reflectance factor (ISO brightness) of pulps, papers and boards. This International Standard is limited in its scope to white and near-white pulps, papers and boards. Materials exhibiting fluorescence which promotes the appearance of whiteness may be measured but the ultraviolet energy level of the illumination must be adjusted using a fluorescent calibration standard if standardization and agreement between instruments is to be achieved. NOTE A brightness value associated with an instrument setting adjusted to conform to the CIE standard illuminant D65 (cf. ISO 11475), which has a much higher UV-content than the CIE illuminant C specified in this International Standard, is outside the scope of this International Standard and consequently is not "ISO brightness". Such a property may be called "D65 brightness".

ISO 2470:1999 Referenced Document

ISO 186 Paper and board - Sampling to determine average quality*， 2002-03-01 Update
ISO 2469 Paper, board and pulps*， 2024-03-01 Update
ISO 3688 Pulps — Preparation of laboratory sheets for the measurement of optical properties*， 2022-12-06 Update
ISO 4094 Paper, board and pulps - General requirements for the competence of laboratories authorized for the issue of optical reference transfer standards of level 3*， 2017-12-04 Update
ISO 7213 Pulps — Sampling for testing*， 2021-12-07 Update

1999 ISO 2470:1999 Paper, board and pulps - Measurement of diffuse blue reflectance factor (ISO brightness)
1977 ISO 2470:1977 Paper and board; Measurement of diffuse blue reflectance factor (ISO brightness)
1973 ISO 2470:1973 Paper and board — Measurement of diffuse blue reflectance factor (ISO brightness)