NEN ISO 3688 : 1999
Current
The latest, up-to-date edition.
PULPS - PREPARATION OF LABORATORY SHEETS FOR THE MEASUREMENT OF DIFFUSE BLUE REFLECTANCE FACTOR (ISO BRIGHTNESS)
12-01-2013
Gives two procedures for the preparation of laboratory sheets prior to measuring the diffuse blue reflectance factor (ISO brightness). One is the traditional procedure based on preparation of sheets in a Buechner funnel using a filter paper or a wire screen. In the other procedure, the sheets are prepared in a standard sheet former (conventional or Rapid Koethen).
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