Norm

NEN-ISO 2470-2:2013 en

Papier, karton en celstof - Meting van de diffuse blauwe reflectiefactor - Deel 2: Buitendaglichtvoorwaarden (D65-helderheid)

52,53

Over deze norm

Status Definitief
Aantal pagina's 8
Gepubliceerd op 01-01-2013
Taal Engels
This part of ISO 2470 specifies a method for measuring the D65 brightness of pulps, papers and boards. This part of ISO 2470 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 ISO 2470 excites almost twice as much fluorescence as the illuminant in ISO 2470-1. Consequently, this part of ISO 2470 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.

Details

ICS-code 85.040
85.060
Nederlandse titel Papier, karton en celstof - Meting van de diffuse blauwe reflectiefactor - Deel 2: Buitendaglichtvoorwaarden (D65-helderheid)
Engelse titel Paper, board and pulps - Measurement of diffuse blue reflectance factor - Part 2: Outdoor daylight conditions (D65 brightness)

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