ISO 23713:2005 PDF

Name: ISO 23713:2005 — Pulps — Determination of fibre coarseness by automated optical analysis — Polarized light method
SKU: ISO 23713:2005
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Pulps — Determination of fibre coarseness by automated optical analysis — Polarized light method

Название (английский):

ISO 23713:2005

Pulps — Determination of fibre coarseness by automated optical analysis — Polarized light method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 8
Дата публикации:: 22 июня 2005 г.
Издание:: ISO IS 23713 edition 1 version 1
ICS:: 85.040

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Описание (английский):

ISO 23713:2005 specifies a method for determining fibre coarseness using polarized light. The method is applicable to all kinds of pulp that polarize light. However fibrous particles shorter than 0,2 mm are not regarded as fibres for the purposes of ISO 23713:2005 and therefore are not to be included in the results.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 23713:2005 - "Pulps - Determination of fibre coarseness by automated optical analysis - Polarized light method" specifies an automated optical test for measuring fibre coarseness in pulps that polarize light. The method uses a polarized light setup to discriminate birefringent cellulose fibres from non-birefringent particles (air bubbles, fillers). Fibrous particles shorter than 0.2 mm are treated as fines and are excluded from results.

Keywords: ISO 23713:2005, fibre coarseness, polarized light method, automated optical analysis, pulp testing, birefringence.

Key topics and technical requirements

Principle: Suspended fibres are passed through a fibre-orienting cell (FOC); projected fibre lengths are measured automatically. Crossed polarizers exploit birefringence of cellulose to separate fibres from non-fibrous material.

Sample preparation:

Disintegration per relevant ISO methods (chemical or mechanical pulps).
Removal of fines by forming and rinsing a wet laboratory sheet (approx. 0.50 g oven-dry) and selecting debris-free portions.
Prepare multiple test portions with controlled concentration and oven-dry mass.

Instrumentation:

Fibre length analyzer conforming to ISO 16065-1 (polarized light method).
Standard lab equipment: disintegrator, sheet former, precision balances, vials; use of a reference pulp for verification.

Calculations:

Total fibre length LT = sum of individual fibre lengths.
Fibre coarseness C (mg/m) = oven-dry mass of fibres in test portion / LT.
Mean coarseness is the average of test portions.

Verification & precision:

Calibration check weekly; performance check monthly using a reference pulp.
Published precision: repeatability CV ≈ 4% (hardwood/softwood); reproducibility CV varies (e.g., hardwood ~10.5%, softwood ~5.1%).

Applications and who uses it

Quality control and process monitoring in the pulp and paper industry.

R&D and product development for furnish selection, pulp treatment, and refining studies.

Independent testing laboratories validating pulp properties.

Instrument manufacturers and service providers supplying automated fibre analyzers. Practical benefits include objective, repeatable measurement of coarseness to support pulp characterization and downstream paper performance assessments.

Related standards

ISO 16065-1 - Fibre length by automated optical analysis (polarized light)

ISO 5263-1 / -2 / -3 - Laboratory wet disintegration (chemical/mechanical pulps)

ISO 5269-1 - Preparation of laboratory sheets

ISO 638 - Dry matter content

ISO 4119 - Stock concentration

ISO 7213 - Sampling for testing

ISO 23713:2005 is a targeted, standardized procedure for laboratories and industry professionals needing reliable, automated measurements of fibre coarseness using the polarized light technique.

ISO 23713:2005 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

Технические детали

ISO 16065-1:2001

Pulps — Determination of fibre length by automated optical analysis — Part 1: Polarized light method

SIST EN ISO 5263-1:2005

Pulps - Laboratory wet disintegration - Part 1: Disintegration of chemical pulps (ISO 5263-1:2004)

SIST EN ISO 5269-1:2005

Pulps - Preparation of laboratory sheets for physical testing - Part 1: Conventional sheet-former method (ISO…

SIST EN ISO 638-1:2022

Paper, board, pulps and cellulosic nanomaterials - Determination of dry matter content by oven-drying method…

SIST EN ISO 4119:2000

Pulps - Determination of stock concentration (ISO 4119:1995)

SIST EN ISO 7213:2022

Pulps - Sampling for testing (ISO 7213:2021)