ISO 5350-4:2006

Pulps — Estimation of dirt and shives — Part 4: Instrumental inspection by reflected light using Equivalent Black Area (EBA) method

Standard Details

ISO 5350-4:2006 specifies a method using instrumental inspection by reflected light for the estimation of visible dirt and shives in pulp manufactured in sheets, in terms of Equivalent Black Area (EBA) of dirt specks within the physical area range of 0,02 mm² to 3,0 mm². Using the algorithm prescribed in ISO 5350-4:2006, the maximum dirt size is limited to 3,0 mm². Extension to other speck sizes (for example, those greater than 3,0 mm² in physical area) may require changes in equipment, calculation procedures, or both, and is not covered in ISO 5350-4:2006. ISO 5350-4:2006 cannot be used for physical area measurements since it may not correctly measure the dirt specks for that mode of measurement.

The specimen to be evaluated should have a brightness, as determined by ISO 3688, of 30 % or greater. It may be necessary to reform some pulp sheets into laboratory sheets, if the surface is too rough or textured.

ISO 5350-4:2006 is also intended for recycled pulp.

General Information

Status : Published

Standard Type: Main

Document No: ISO 5350-4:2006

Document Year: 2006

Pages: 10

Edition: 1

Section Volume:
ISO/TC 6. Paper, board and pulps

ICS:
85.040 Pulps

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ISO 5350-4:2006

ISO 5350-4:2006

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