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ÖNORM EN ISO 5350-2:2006-12

Действует
Pulps - Estimation of dirt and shives - Part 2: Inspection of mill sheeted pulp by transmitted light (ISO 5350-2:2006)
This part of ISO 5350 specifies a method for the estimation by transmitted light of the visible dirt and shives in
pulp manufactured in sheets.
It does not apply to unbleached kraft pulps or to any other sheeted pulps that are too opaque to allow for the
estimation of the minimum size or for minimum contrast specks to be counted, in accordance with this part of
ISO 5350. The maximum grammage for most pulp sheets is in the range 800 g/m2 to 1 000 g/m2.
If the sheets of the mill sheeted pulp have high grammage or are very opaque for other reasons, ISO 5350-1
should be applied.
NOTE For thick sheets, with highly textured surfaces and/or with density variations, wetting the sheet will cause
optical variations, called lens distortions, that will distort the perceived size of a dirt speck, thus reducing the precision of
the size estimation. Alternatively, use ISO 5350-1 to disintegrate the sheet and to prepare laboratory sheets for the size
estimation.
This part of ISO 5350 is not intended for recycled pulp.
Diese Norm legt die Vorgehensweise für das Durchlichtverfahren fest, das zur Schätzung von Schmutz und Splittern in Bogenform hergestellten Faserstoffen dient. Sie ist nicht für ungebleichte Kraftzellstoffe oder sonstige Faserstoffe in Bogenform anwendbar, welche zu opak sind, und deshalb eine Erfassung der Mindestgröße oder die Erfassung bei einem Mindestkontrast der Flecken, Schmutzstellen und Splittern in Übereinstimmung mit der vorliegenden Norm nicht zulassen.
ICS
85.040 Pulps / Целлюлоза