ISO 4119:1995
(Main)Pulps — Determination of stock concentration
General Information
- Abstract
Cancels and replaces the first edition (1978). Specifies a method for determining the stock concentration of aqueous pulp suspensions. Used in laboratory procedures for the determination of other pulp properties and is referred to in a range of other ISO standards where pulp suspensions are involved. Not intended for determining the saleable mass of slush pulps. In principle, applicable to all kinds of aqueous pulp suspensions.
- Status
- Published
- Publication Date
- 07-Jun-1995
- Technical Committee
- ISO/TC 6 - Paper, board and pulps
- Drafting Committee
- ISO/TC 6 - Paper, board and pulps
- Current Stage
- 9060 - Close of review
- Completion Date
- 02-Dec-2031
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ISO 4119:1995 - Pulps — Determination of stock concentration Released:6/8/1995
ISO 4119:1995 - Pâtes — Détermination de la concentration en pâte
Overview
ISO 4119:1995 - "Pulps - Determination of stock concentration" specifies a laboratory method for measuring the stock concentration (dry-matter content) of aqueous pulp suspensions. This second edition replaces ISO 4119:1978 and is intended as a reference procedure used before other pulp tests and within a range of ISO standards that handle pulp suspensions. The method is in principle applicable to all kinds of aqueous pulp suspensions but is not intended for determining the saleable mass of slush pulps.
Key topics and requirements
- Purpose: Determine pulp concentration expressed as percentage by mass [ % (dm) ].
- Scope: Applicable to all aqueous pulp suspensions; excludes saleable mass determination for slush pulps.
- Sampling:
- Mix suspension thoroughly and keep agitated during sampling to avoid fiber separation.
- Typical working sample ≈ 500 g; for low concentrations (≤ 0.3 % dm) collect enough to yield ~1–5 g dry mass.
- Filtration:
- Use a filtration device (e.g., Büchner funnel 90–150 mm) with circular filter paper that retains all visible fibers.
- Apply vacuum, rinse vessel walls, check filtrate for visible fibers; repeat filtration or change to less porous paper if fibers pass.
- Drying and weighing:
- Dry filter + fiber cake to constant mass. Oven temperature: 105 °C ± 2 °C; hotplate: 150 °C ± 15 °C.
- Microwave drying allowed only when empirically shown to match oven drying; warn against carbonization.
- Balances: sample balance able to weigh 100–500 g with error <0.1 %; balance for dried cake with error <0.1 %.
- Dilution and aliquots:
- For concentrations > 1 % dm dilute to below 1 % before taking aliquot; document dilution mass precisely.
- Calculation and reporting:
- Calculate concentration X using masses of initial sample, added water (if diluted), aliquot, filter paper and dried fiber cake.
- Report average of determinations with two decimal places and include test details, sample identification and any operational deviations.
Applications and users
ISO 4119 is practical for:
- Laboratory technicians performing routine pulp testing and quality control in pulp and paper mills
- R&D and process laboratories establishing pulp properties prior to further analyses (freeness, viscosity, chemical content)
- QA/QC teams verifying stock concentration for process control and consistency
- Standards committees and testing labs that reference a harmonized pulp stock concentration determination method
Keywords: ISO 4119, pulp concentration, stock concentration, pulp suspensions, laboratory method, pulp testing, pulp stock concentration determination.
Related standards
- Developed by ISO/TC 6 (Papers, board and pulps), subcommittee SC 5 (test methods and quality specifications).
- ISO 4119 is referenced by other ISO test standards dealing with pulp suspensions and serves as a preparatory, harmonized method for subsequent pulp analyses.
Relations
- Effective Date
- 25-Aug-2026
- Effective Date
- 25-Aug-2026
- Effective Date
- 25-Aug-2026
- Effective Date
- 25-Aug-2026
- Referred By
EN ISO 5264-2:2011 - Pulps - Laboratory beating - Part 2: PFI mill method (ISO 5264-2:2011) - Effective Date
- 25-Aug-2026
- Effective Date
- 25-Aug-2026
- Effective Date
- 15-Apr-2008
Buy Documents
ISO 4119:1995 - Pulps — Determination of stock concentration Released:6/8/1995
ISO 4119:1995 - Pâtes — Détermination de la concentration en pâte
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Frequently Asked Questions
ISO 4119:1995 is a standard published by the International Organization for Standardization (ISO). Its full title is "Pulps — Determination of stock concentration". This standard covers: Cancels and replaces the first edition (1978). Specifies a method for determining the stock concentration of aqueous pulp suspensions. Used in laboratory procedures for the determination of other pulp properties and is referred to in a range of other ISO standards where pulp suspensions are involved. Not intended for determining the saleable mass of slush pulps. In principle, applicable to all kinds of aqueous pulp suspensions.
Cancels and replaces the first edition (1978). Specifies a method for determining the stock concentration of aqueous pulp suspensions. Used in laboratory procedures for the determination of other pulp properties and is referred to in a range of other ISO standards where pulp suspensions are involved. Not intended for determining the saleable mass of slush pulps. In principle, applicable to all kinds of aqueous pulp suspensions.
ISO 4119:1995 is classified under the following ICS (International Classification for Standards) categories: 85.040 - Pulps. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 4119:1995 has the following relationships with other standards: It is inter standard links to EN ISO 5263-3:2023, EN ISO 5269-2:2004, EN ISO 5263-2:2004, EN ISO 5263-1:2004, EN ISO 5264-2:2011, EN ISO 5263-3:2004, ISO 4119:1978. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 4119:1995 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-1996
9ODNQLQH'RORþDQMHNRQFHQWUDFLMHVQRYL
Pulps -- Determination of stock concentration
Pâtes -- Détermination de la concentration en pâte
Ta slovenski standard je istoveten z: ISO 4119:1995
ICS:
85.040 Vlaknine Pulps
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
ISO
INTERNATIONAL
STANDARD
Second edition
1995-06-01
Determination of stock
Pulps -
concentration
P&es - Determination de Ia concen tra tion en p0 te
Reference number
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national Standards bodies (ISO member bodies). The work of
preparing International Standards is normally carried out through ISO
technical committees. Esch member body interested in a subject for which
a technical committee has been established has the right to be
represented on that committee. International organizations, governmentar
and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(1 EC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 4119 was prepared by Technical Committee
ISO/TC 6, Paper, board and pulps, Subcommittee SC 5, Test methods and
quality specifica tions for pulp.
This second edition cancels and replaces the first edition (ISO 4119:'! 978),
of which it constitutes a technical revision.
G ISO 1995
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopyrng and
microfilm, without Permission in writing from the pcblisher.
International Organization for Standardization
l CH-l 211 Geneve 20 l Switzerland
Case postale 56
Printed in Switzerland
ii
INTERNATIONAL STANDARD o 0x1 ISO 4119:1995(Ej
Pulps - Determination of stock concentration
3.3 Filtering device, such as a Büchner funnel, of
1 Scope
diameter 90 mm to 150 mm, a large filtering flask, and
circular filter Paper to fit the funnel; the Paper shall be
This International Standard specifies a method for
such that all visible fibre and inorganic material will be
determining the stock concentration of aqueous pulp
retained.
suspensions. lt is used in laboratory procedures for
the determination of other pulp properties and is
3.4 Means for drying the Sample, for example
referred to in a range of other ISO Standards where
suitable drying oven or hotplate. The temperature of
pulp suspensions are involved. lt is not intended for
the drying oven shall be 105 “C + 2 “C and that of the
determining the saleable mass of slush pulps.
hotplate 150 “C + 15 “C.
In principle, this method is applicabie to all kinds of
NOTES
aqueous pulp suspensions.
2 A microwave oven may optionally be used if the
operating conditions (power setting and drying time) are
experimentally determined to produce the Same drying
2 Definitions
effect on pulp as produced by a normal drying oven.
Incorrect operating conditions may Cause charring of the
For the purposes of this International Standard, the
Sample.
following definitions apply.
3 A temperature of 150 “C for the hotplate may be too
high for some pulps and Cause charring of the Sample.
2.1 stock: Aqueous Suspension of one or more
pulps, *tihich may contain fillers and additives.
3.5 Balance, capable of weighing the dried mat of
fibres with an error of less than 0,l %.
2.2 stock concentration: Ratio of the oven-dry
mass of material that tan be filtsred from a stock
Sample, to the mass of unfiltered Sample, when
4 Sampling and Sample preparation
determined as specified in this International Standard.
NOTE 1 In this International Standard, the stock concen-
4.1 General
tration is expressed as a percentage by mass [% (m/m)l.
Mix the stock thoroughly, and stir it while the Sample
is being taken. Samples shall be removed with a
3 Apparatus
suitable vessel by a scooping action, to m
...
ISO
INTERNATIONAL
STANDARD
Second edition
1995-06-01
Determination of stock
Pulps -
concentration
P&es - Determination de Ia concen tra tion en p0 te
Reference number
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national Standards bodies (ISO member bodies). The work of
preparing International Standards is normally carried out through ISO
technical committees. Esch member body interested in a subject for which
a technical committee has been established has the right to be
represented on that committee. International organizations, governmentar
and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(1 EC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 4119 was prepared by Technical Committee
ISO/TC 6, Paper, board and pulps, Subcommittee SC 5, Test methods and
quality specifica tions for pulp.
This second edition cancels and replaces the first edition (ISO 4119:'! 978),
of which it constitutes a technical revision.
G ISO 1995
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopyrng and
microfilm, without Permission in writing from the pcblisher.
International Organization for Standardization
l CH-l 211 Geneve 20 l Switzerland
Case postale 56
Printed in Switzerland
ii
INTERNATIONAL STANDARD o 0x1 ISO 4119:1995(Ej
Pulps - Determination of stock concentration
3.3 Filtering device, such as a Büchner funnel, of
1 Scope
diameter 90 mm to 150 mm, a large filtering flask, and
circular filter Paper to fit the funnel; the Paper shall be
This International Standard specifies a method for
such that all visible fibre and inorganic material will be
determining the stock concentration of aqueous pulp
retained.
suspensions. lt is used in laboratory procedures for
the determination of other pulp properties and is
3.4 Means for drying the Sample, for example
referred to in a range of other ISO Standards where
suitable drying oven or hotplate. The temperature of
pulp suspensions are involved. lt is not intended for
the drying oven shall be 105 “C + 2 “C and that of the
determining the saleable mass of slush pulps.
hotplate 150 “C + 15 “C.
In principle, this method is applicabie to all kinds of
NOTES
aqueous pulp suspensions.
2 A microwave oven may optionally be used if the
operating conditions (power setting and drying time) are
experimentally determined to produce the Same drying
2 Definitions
effect on pulp as produced by a normal drying oven.
Incorrect operating conditions may Cause charring of the
For the purposes of this International Standard, the
Sample.
following definitions apply.
3 A temperature of 150 “C for the hotplate may be too
high for some pulps and Cause charring of the Sample.
2.1 stock: Aqueous Suspension of one or more
pulps, *tihich may contain fillers and additives.
3.5 Balance, capable of weighing the dried mat of
fibres with an error of less than 0,l %.
2.2 stock concentration: Ratio of the oven-dry
mass of material that tan be filtsred from a stock
Sample, to the mass of unfiltered Sample, when
4 Sampling and Sample preparation
determined as specified in this International Standard.
NOTE 1 In this International Standard, the stock concen-
4.1 General
tration is expressed as a percentage by mass [% (m/m)l.
Mix the stock thoroughly, and stir it while the Sample
is being taken. Samples shall be removed with a
3 Apparatus
suitable vessel by a scooping action, to minimize the
Separation of fibres from the water. The entire Sample
Ordinary laboratory apparatus and may be obtained in one dipping action, or several
smaller samples may be combined, but all of the
3.1 Weighing Containers, or sufficient size for stock removed shall be included in the Sample to be
weighing the stock Sample or the filter (see clause 5, weighed. Incorrect sampling techniques tan introduce
note 4). significant errors at higher concentrations.
...
NORME
ISO
INTERNATIONALE
Deuxième édition
1995-06-01
Pâtes - Détermination de la concentration
en pâte
Pulps - De termina tion of s teck concentration
Numéro de référence
OS0 4119:1995(F)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération
mondiale d’organismes nationaux de normalisation (comités membres de
I’ISO). L’élaboration des Normes internationales est en général confiée aux
comités techniques de I’ISO. Chaque comité membre intéressé par une
étude a le droit de faire partie du comité technique créé a cet effet. Les
organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I’ISO participent également aux travaux. L’ISO
collabore étroitement avec la Commission électrotechnique internationale
(CEI) en ce qui concerne la normalisation électrotechnique.
Les projets de Normes internationales adoptés par les comités techniques
sont soumis aux comités membres pour vote. Leur publication comme
Normes internationales requiert l’approbation de 75 % au moins des
comités membres votants.
La Norme internationale ISO 4119 a été élaborée par le comité technique
ISO/TC 6, Papiers, cartons et pâtes, sous-comité SC 5, Méthodes d’essai
et spécifications de qualité des pâtes.
Cette deuxième édition annule et remplace la première édition
(ISO 4119:1978), dont elle constitue une révision technique.
0 ISO 1995
Droits de reproduction réservés. Sauf prescription différente, aucune partie de cette publi-
cation ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun
procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans
l’accord écrit de l’éditeur.
Organisation internationale de normalisation
56 0 CH-121 1 Genève 20 l Suisse
Case postale
Imprimé en Suisse
ii
NORME INTERNATIONALE o ISO
Pâtes - Détermination de la concentration en pâte
3.2 Balance, à même de peser une masse de 100 g
1 Domaine d’application
à 500 g avec une erreur inférieure a 0,l %.
La présente Norme internationale prescrit une
3.3 Dispositif de filtration, par exemple un enton-
méthode pour la détermination de la concentration en
noir de Büchner ayant un diamètre de 90 mm a
pâte de suspensions aqueuses de pâte. L’intention
150 mm, une grande fiole de filtration et un papier
est de l’utiliser en méthode de laboratoire pour la
filtre circulaire s’adaptant à l’entonnoir et de qualité
détermination d’autres propriétés de la pâte. Elle est
telle qu’il retienne toutes les fibres visibles des
citée dans un certain nombre de Normes interna-
suspensions aqueuses de pâte.
tionales traitant des suspensions de pâte. Elle n’est
pas destinée a la détermination de la masse vendable
3.4 Équipement pour le séchage de l’échantillon,
des pâtes désintégrées.
par exemple une plaque chauffante ou une étuve. La
température de l’étuve doit être de 105 “C k 2 “C et
En principe, cette méthode s’applique a tous les types
de suspension aqueuse de pâte. celle de la plaque chauffante, de 150 “C + 15 OC.
NOTES
2 Définitions
2 Un four à micro-ondes peut également être utilise si les
conditions de fonctionnement (mise en marche et temps
Pour les besoins de la présente Norme internationale,
de séchage) déterminées par expérience permettent
d’obtenir le même effet de séchage pour la pulpe que celui
les définitions suivantes s’appliquent.
obtenu par une étuve normale. Des conditions de fonction-
nement incorrectes peuvent entraîner la carbonisation de
2.1 suspension de pâte: Suspension aqueuse d’une
l’échantillon.
ou de plusieurs pâtes pouvant contenir des charges et
des additifs.
3 Une température de 150 “C pour la plaque chauffante
peut s’avérer trop élevée pour certaines pâtes et entraîner
2.2 concentration en pâte: Rapport de la masse
la carbonisation de l’échantillon.
anhydre de matière pouvant être filtrée d’un échan-
tillon de pâte en suspension, a la masse de I’échan-
3.5 Balance, à même de peser le gâteau de fibres
tillon non filtré, l’essai étant effectué conformément à
séché avec une erreur inférieure a 0,l %.
la présente Norme internationale.
NOTE 1 Dans la présente Norme internationale, la concen-
4 Préparation de l’échantillon
tration en pâte est exprimée en pourcentage en masse
[ % (dm)].
4.1 Généralités
3 Appareillage
Mélanger intimement la suspension de pâte et pour-
suivre l’agitation pendant le prélèvement de I’échan-
Matériel courant de laboratoire, et tillon. Les échantillons doivent être prélevés a l’aide
d’un récipient approprié en le plongeant rapidement
3.1 Récipients de pesée, de dimensions suffisantes, dans la suspension de façon a réduire la séparation
pour peser l’échantillon de pâte ou le filtre (voir des fibres. L’échantillon complet peut être obtenu en
article 5, note 4). une plongée, ou bien plusieurs échantillons plus petits
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