SIST EN ISO 23321:2021
(Main)Solvents for paints and varnishes - Demineralized water for industrial applications - Specification and test methods (ISO 23321:2019)
Solvents for paints and varnishes - Demineralized water for industrial applications - Specification and test methods (ISO 23321:2019)
This document specifies the properties and requirements for demineralized water used as solvent for paints and varnishes industrial applications, e.g. production of electro-deposition coating materials, water-based coating materials, water-based resins and plastics dispersions.
This document is not applicable to water for analytical use.
NOTE See ISO 3696.
Lösemittel für Beschichtungsstoffe - Vollentsalztes Wasser für industrielle Anwendungen - Anforderungen und Prüfverfahren (ISO 23321:2019)
Solvants pour peintures et vernis - Eau déminéralisée pour l'application industrielle - Spécification et méthodes d'essai (ISO 23321:2019)
Le présent document spécifie les propriétés et exigences relatives à l'eau déminéralisée utilisée comme solvant pour les peintures et vernis pour applications industrielles, par exemple pour la production de produits de peinture par électrodéposition, de produits de peinture en phase aqueuse, de résines en phase aqueuse et de dispersions de plastiques.
Le présent document n'est pas applicable à l'eau à usage analytique.
NOTE Voir l'ISO 3696.
Topila za barve in lake - Demineralizirana voda za industrijsko uporabo - Specifikacija in preskusne metode (ISO 23321:2019)
General Information
- Status
- Published
- Public Enquiry End Date
- 01-Oct-2020
- Publication Date
- 27-Jan-2021
- Technical Committee
- IBLP - Paints and varnishes
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 11-Jan-2021
- Due Date
- 18-Mar-2021
- Completion Date
- 28-Jan-2021
Relations
- Effective Date
- 09-Feb-2026
- Refers
oSIST prEN ISO/IEC 24970:2026 - Artificial intelligence - AI system logging (ISO/IEC DIS 24970:2025) - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
SIST EN ISO 23321:2021 specifies the requirements and test methods for demineralized water used as a solvent in industrial applications related to paints and varnishes. This European and International Standard ensures the high purity of demineralized water for processes such as production of electro-deposition coating materials, water-based coatings, resins, and plastics dispersions. Adhering to these specifications is critical to achieving consistent quality, performance, and stability in formulated products. Notably, this standard is not applicable to water intended for analytical laboratory use -for such purposes, ISO 3696 should be consulted.
Key Topics
Properties of Demineralized Water
The standard details specific physical and chemical requirements for demineralized water used as a process solvent:- Clear appearance without foreign matter
- Maximum electrical conductivity at 25°C: 20 µS/cm
- pH value at 23°C: 5 to 8
- Chloride content: maximum 3 mg/l
- Evaporation residue: maximum 5 mg/kg
- Colony count: should be free from microbiological contamination
Test Methods and Verification The standard describes validated methods for verifying compliance, including:
- Visual inspection for clarity
- Measurement of electrical conductivity and pH
- Ion chromatography for chloride measurement
- Gravimetric determination of evaporation residue
- Determination of microbial contamination by colony count
Sampling and Handling Procedures Guidance is included for sterile sampling, storage, and disposal to maintain the integrity and accuracy of water quality assessments. Proper sterilization and aseptic techniques are essential for reliable microbiological testing.
Applications
Demineralized water conforming to SIST EN ISO 23321:2021 is essential in various sectors within the paints and coatings industry:
Coating Formulation and Production
Used as a process solvent in manufacturing water-based paints, varnishes, resins, and dispersions, where water purity directly affects product quality and stability.Electro-deposition Coatings
Ensures consistent properties in electrodeposition baths by minimizing ionic contamination that can interfere with the electrochemical process.Quality Control and Regulatory Compliance
Manufacturers and quality assurance laboratories apply this standard to ensure compliance, avoid variability, and meet both customer and regulatory expectations for product performance.Industrial Equipment Longevity
Using specification-compliant demineralized water helps prevent corrosion and scaling in mixing and application equipment, contributing to lower maintenance costs.
Related Standards
For comprehensive water quality management in paints and varnishes, the following standards are relevant:
ISO 3696: Water for analytical laboratory use - Specification and test methods
(Recommended if the water is to be used in laboratory analysis rather than industrial applications.)ISO 10304-1: Water quality - Determination of dissolved anions by liquid chromatography
(Referenced for the procedure to measure chloride content.)ISO 15091: Paints and varnishes - Determination of electrical conductivity and resistance
(Utilized for verifying electrical conductivity.)ISO 19396-1 and ISO 19396-2: Paints and varnishes - Determination of pH value
(Procedures for measuring pH with different electrode technologies.)ISO 4618: Paints and varnishes - Terms and definitions
(Provides standardized terminology.)
Summary
Adhering to SIST EN ISO 23321:2021 ensures that demineralized water used as a solvent in the paints and varnishes industry meets strict quality and purity standards. This leads to improved product consistency, increased process reliability, and reduced risk of defects or contamination, supporting both manufacturers and end-users in achieving high-quality results in industrial coatings applications.
Frequently Asked Questions
SIST EN ISO 23321:2021 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Solvents for paints and varnishes - Demineralized water for industrial applications - Specification and test methods (ISO 23321:2019)". This standard covers: This document specifies the properties and requirements for demineralized water used as solvent for paints and varnishes industrial applications, e.g. production of electro-deposition coating materials, water-based coating materials, water-based resins and plastics dispersions. This document is not applicable to water for analytical use. NOTE See ISO 3696.
This document specifies the properties and requirements for demineralized water used as solvent for paints and varnishes industrial applications, e.g. production of electro-deposition coating materials, water-based coating materials, water-based resins and plastics dispersions. This document is not applicable to water for analytical use. NOTE See ISO 3696.
SIST EN ISO 23321:2021 is classified under the following ICS (International Classification for Standards) categories: 87.060.30 - Solvents. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN ISO 23321:2021 has the following relationships with other standards: It is inter standard links to SIST ISO 3696:1995, oSIST prEN ISO/IEC 24970:2026, SIST EN ISO/IEC 17000:2020. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN ISO 23321:2021 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-marec-2021
Topila za barve in lake - Demineralizirana voda za industrijsko uporabo -
Specifikacija in preskusne metode (ISO 23321:2019)
Solvents for paints and varnishes - Demineralized water for industrial applications -
Specification and test methods (ISO 23321:2019)
Lösemittel für Beschichtungsstoffe - Vollentsalztes Wasser für industrielle Anwendungen
- Anforderungen und Prüfverfahren (ISO 23321:2019)
Solvants pour peintures et vernis - Eau déminéralisée pour l'application industrielle -
Spécification et méthodes d'essai (ISO 23321:2019)
Ta slovenski standard je istoveten z: EN ISO 23321:2020
ICS:
87.060.30 Topila Solvents
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 23321
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2020
EUROPÄISCHE NORM
ICS 87.040
English Version
Solvents for paints and varnishes - Demineralized water
for industrial applications - Specification and test methods
(ISO 23321:2019)
Solvants pour peintures et vernis - Eau déminéralisée Lösemittel für Beschichtungsstoffe - Vollentsalztes
pour l'application industrielle - Spécification et Wasser für industrielle Anwendungen - Anforderungen
méthodes d'essai (ISO 23321:2019) und Prüfverfahren (ISO 23321:2019)
This European Standard was approved by CEN on 30 November 2020.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 23321:2020 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO 23321:2019 has been prepared by Technical Committee ISO/TC 35 "Paints and
varnishes” of the International Organization for Standardization (ISO) and has been taken over as
which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by June 2021, and conflicting national standards shall be
withdrawn at the latest by June 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 23321:2019 has been approved by CEN as EN ISO 23321:2020 without any modification.
INTERNATIONAL ISO
STANDARD 23321
First edition
2019-06
Solvents for paints and varnishes —
Demineralized water for industrial
applications — Specification and test
methods
Solvants pour peintures et vernis — Eau déminéralisée pour
l'application industrielle — Spécification et méthodes d'essai
Reference number
ISO 23321:2019(E)
©
ISO 2019
ISO 23321:2019(E)
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
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Published in Switzerland
ii © ISO 2019 – All rights reserved
ISO 23321:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 1
5 Example of the determination of the colony content . 2
5.1 Apparatus . 2
5.2 Materials . 2
5.3 Sterilization of the tap before sampling of water . 2
5.4 Sampling . 3
5.5 Procedure . 3
5.6 Evaluation . 3
5.7 Disposal of the overgrown contact slides . 3
6 Test report . 3
Bibliography .
...