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<p>This International Standard specifies two procedures for the preparation of laboratory sheets prior to measuring the<br />diffuse blue reflectance factor (ISO brightness). One is the traditional procedure based on preparation of sheets in a<br />Büchner funnel using a filter paper or a wire screen. ln the other procedure, the sheets are prepared in a standard<br />sheet former (conventional or Rapid Köthen).<br />Details of the subsequent measurement procedure are given in ISO 2470.<br />It is applicable to all wood pulps and to most other types of pulp. Pulps with very long fibres, such as those made<br />from unshortened cotton, flax and similar materials, shall be reduced to a suitable fibre length before testing by this<br />method.<br />This International Standard shall be used in conjunction with ISO 2469 and ISO 2470.</p>
Reģistrācijas numurs (WIID)
9155
Darbības sfēra
<p>This International Standard specifies two procedures for the preparation of laboratory sheets prior to measuring the<br />diffuse blue reflectance factor (ISO brightness). One is the traditional procedure based on preparation of sheets in a<br />Büchner funnel using a filter paper or a wire screen. ln the other procedure, the sheets are prepared in a standard<br />sheet former (conventional or Rapid Köthen).<br />Details of the subsequent measurement procedure are given in ISO 2470.<br />It is applicable to all wood pulps and to most other types of pulp. Pulps with very long fibres, such as those made<br />from unshortened cotton, flax and similar materials, shall be reduced to a suitable fibre length before testing by this<br />method.<br />This International Standard shall be used in conjunction with ISO 2469 and ISO 2470.</p>
