Historical
ISO 2470:1999
Paper, board and pulps -- Measurement of diffuse blue reflectance factor (ISO brightness)
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.
CONTENT PROVIDER
International Organization for Standardization [iso]
International Organization for Standardization [iso]