ISO 5350-1:2006 PDF

Pulps — Estimation of dirt and shives — Part 1: Inspection of laboratory sheets by transmitted light

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Title (English):

ISO 5350-1:2006

Pulps — Estimation of dirt and shives — Part 1: Inspection of laboratory sheets by transmitted light

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 12
Publication date:: August 9, 2006
Edition:: ISO IS 5350 edition 3 version 1
ICS:: 85.040

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Description (English):

ISO 5350-1:2006 specifies a method for the estimation by transmitted light of the visible dirt and shives in laboratory sheets prepared from pulp. It is, in principle, applicable to all kinds of pulp, although it is mainly intended for pulp that is not manufactured in sheet form. ISO 5350-1:2006 can also be applied to mill sheeted pulp, if the sheets have high grammage or are very opaque for other reasons, in which case ISO 5350-2:2006 is not applicable. ISO 5350-1:2006 is not intended for recycled pulp.

Technical details

Technical committee: ISO/TC 6 - Paper, board and pulps
SKU: ISO 5350-1:2006

Abstract

Overview

ISO 5350-1:2006 - Pulps - Estimation of dirt and shives - Part 1: Inspection of laboratory sheets by transmitted light defines a standardized visual method to estimate visible dirt and shives in laboratory sheets formed from pulp. The method is intended mainly for pulps not manufactured in sheet form but can be applied to opaque mill sheeted pulps. It is not intended for recycled pulp. Results are reported as total area of contraries expressed in mm² per kg of oven-dry pulp.

Key topics and technical requirements

Principle: Visual inspection of laboratory sheets under transmitted light; areas of contrasting particles (contraries) are estimated and summed.
Scope limits: Not for recycled pulp; some mechanical pulps may be impractical for this method.
Sampling & sample size: Test portions must be representative (ISO 7213). At least 100 g oven-dry pulp is required for inspection (180 g recommended to allow preliminary testing).
Disintegration & sheet preparation: Follow ISO 5263‑1/2/3 for disintegration and ISO 5269‑1/2 for laboratory sheet forming; ensure clean apparatus and filtered water.
Viewing conditions: Use a viewing table with transmitted artificial daylight; luminance at the table surface should be 2,500–3,000 cd/m². Avoid external daylight.
Comparison chart: Use the transparent comparison chart in Annex A for area estimation - do not use photocopies.
Size thresholds & classification: Only contraries with area ≥ 0.04 mm² are counted. The standard defines size classes (with logarithmic mean areas) for reporting and calculation.
Calculation & reporting: Total area (or by class/dirt vs shive) is calculated in mm²/kg using class mean areas; report to nearest integer (results

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and technical requirements

Principle: Visual inspection of laboratory sheets under transmitted light; areas of contrasting particles (contraries) are estimated and summed.
Scope limits: Not for recycled pulp; some mechanical pulps may be impractical for this method.
Sampling & sample size: Test portions must be representative (ISO 7213). At least 100 g oven-dry pulp is required for inspection (180 g recommended to allow preliminary testing).
Disintegration & sheet preparation: Follow ISO 5263‑1/2/3 for disintegration and ISO 5269‑1/2 for laboratory sheet forming; ensure clean apparatus and filtered water.
Viewing conditions: Use a viewing table with transmitted artificial daylight; luminance at the table surface should be 2,500–3,000 cd/m². Avoid external daylight.
Comparison chart: Use the transparent comparison chart in Annex A for area estimation - do not use photocopies.
Size thresholds & classification: Only contraries with area ≥ 0.04 mm² are counted. The standard defines size classes (with logarithmic mean areas) for reporting and calculation.
Calculation & reporting: Total area (or by class/dirt vs shive) is calculated in mm²/kg using class mean areas; report to nearest integer (results

ISO 5350-1:2006 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

Related standards

Pulps - Sampling for testing (ISO 7213:2021)

Pulps. Preparation of laboratory sheets for physical testing - Conventional sheet-former method

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