EN 646:2018
(Main)Paper and board intended to come into contact with foodstuffs - Determination of colour fastness of dyed paper and board
Paper and board intended to come into contact with foodstuffs - Determination of colour fastness of dyed paper and board
This document describes procedures for the testing of dyed paper and board intended to come into contact with foodstuffs. Some procedures depending on the foreseeable use of the material are given.
Visual evaluation against a grey scale provides grading of the bleeding.
For samples having significant different sides, a migration can occur from one glass fibre to the other and could lead to wrong interpretation of the fastness of one side. It is advisable to check these samples using large sampling procedure to prevent cross contamination of the glass fibre during the migration procedure. The procedure is described in Annex A. If lower limit of detection is required, this procedure could also be used.
Papier und Pappe vorgesehen für den Kontakt mit Lebensmitteln - Bestimmung der Farbechtheit von gefärbtem Papier und Pappe
Dieses Dokument legt ein Verfahren zur Prüfung von gefärbtem Papier und Pappe, die für den Kontakt mit Lebensmitteln bestimmt sind, fest. Es werden verschiedene Varianten angegeben, je nach vorher¬sehbarer Nutzung des vorhandenen Werkstoffs.
Die visuelle Bewertung gegen einen Graumaßstab gibt Abstufungen beim Ausbluten vor.
Bei Proben mit wesentlich unterschiedlichen Seiten kann es zu einer Migration von einer Glasfaser zur anderen kommen, was wiederum zur falschen Interpretation der Farbechtheit auf einer Seite führen könnte. Es ist empfehlenswert, diese Proben im großen Probenahmeverfahren zu prüfen, um eine Querkontamination der Glasfasern während des Migrationsvorgangs zu vermeiden. Das Verfahren ist in Anhang A beschrieben. Wenn niedrigere Nachweisgrenzen gefordert sind, könnte dieses Verfahren ebenfalls zur Anwendung kommen.
Papiers et cartons destinés à entrer en contact avec les denrées alimentaires - Détermination de la solidité de la couleur des papiers et cartons colorés
Le présent document décrit les modes opératoires d’essai pour papiers et cartons colorés destinés à entrer en contact avec les denrées alimentaires. Plusieurs modes opératoires selon l’utilisation prévisible du matériau sont décrits.
L’examen visuel par rapport à une échelle de gris permet un classement du dégorgement.
Pour les échantillons dont les faces sont sensiblement différentes, une migration peut se produire d’une fibre de verre à l’autre et peut conduire à une mauvaise interprétation de la solidité d’une face. Il est recommandé de vérifier ces échantillons à l’aide d’un mode opératoire d’échantillonnage utilisant des échantillons de grande taille afin d’empêcher la contamination croisée de la fibre de verre au cours de la procédure de migration. Le mode opératoire est décrit à l’Annexe A. Si une limite de détection inférieure est requise, ce mode opératoire peut également être utilisé.
Papir, karton in lepenka, namenjeni za stik z živili - Ugotavljanje obstojnosti barve v obarvanem papirju, kartonu in lepenki
Ta dokument opisuje postopke za preskušanje barvanega papirja in kartona, namenjenega za neposreden stik z živili. Podani so nekateri postopki, odvisni od predvidene uporabe materiala. Vizualna ocena na lestvici sivih tonov omogoča razvrščanje izločljivosti. OPOMBA: Pri vzorcih, katerih strani se precej razlikujejo, lahko pride do prehajanja iz enega steklenega vlakna v drugega, kar lahko privede do napačnega prepoznavanja obstojnosti ene strani. Te vzorce je treba pregledati s postopkom velikega vzorčenja, da se prepreči navzkrižna kontaminacija steklenih vlaken med postopkom prehajanja. Postopek je opisan v dodatku A. Če je potrebna spodnja meja zaznavanja, se lahko uporabi tudi ta postopek.
General Information
Relations
Overview
EN 646:2018 is a European standard developed by CEN that specifies the procedures for determining the colour fastness of dyed paper and board intended for direct contact with foodstuffs. This standard ensures that coloured food packaging materials do not transfer dyes or stains during use, safeguarding food safety and consumer health. The document replaces the previous EN 646:2006 and includes updated test conditions, procedures, and evaluation criteria reflecting current industry needs.
Key features include:
- Testing dyed paper and board materials for colour bleeding.
- Use of visual grading against a grey scale for staining evaluation.
- Special procedures for samples with significantly different sides to avoid cross-contamination.
- Defined test fluids and contact conditions simulating real-world food packaging scenarios.
Key Topics
Scope and Purpose
EN 646:2018 applies to dyed papers and boards that come into contact with food, addressing both long-term and short-term contact conditions. It provides methods tailored to different foreseeable uses of the packaging material.Test Principle
The testing involves placing the dyed paper or board between layers of unstained glass fibre papers saturated in specific test fluids. After exposure under controlled time, temperature, and pressure, the transfer of colour to glass fibre papers is visually assessed using an EN 20105-A03 grey scale.Materials and Reagents
Essential materials include unstained glass fibre papers with defined properties (grammage, pH, absence of cellulose), glass plates, polyethylene film, and specific test fluids such as distilled water, acetic acid solution, alkaline salt solution, and vegetable oil compliant with EU food contact regulations.Test Procedures
Four key procedures simulate contact durations and conditions:- Procedure A: Long duration (24 hours at 23°C).
- Procedure B: Medium duration (4 hours at 23°C).
- Procedure C: Short duration (10 minutes at 23°C).
- Procedure D: Hot contact (30 minutes at 90°C or 120°C depending on food type).
The standard also covers preparation and handling of samples, including large sample testing for unevenly sided materials to prevent migration artifacts.
Evaluation and Reporting
Colour fastness is graded from 1 (poor) to 5 (excellent) against the grey scale. The test report must clearly state sample identification, testing procedure, test fluids used, results, and any deviations from the standard.
Applications
EN 646:2018 is critical for manufacturers and quality control laboratories involved in producing food packaging paper and board. Its application ensures:
Food Safety Compliance
Preventing colour bleeding helps maintain food purity and meets regulatory requirements for materials in food contact.Packaging Quality Assurance
Verifies the durability of dyes used in food packaging under various conditions, including oil contact and hot food exposure.Design and Development
Supports innovation by providing reliable methods to test novel dyed papers and boards before market release.Regulatory Alignment
Harmonizes testing across Europe, aiding manufacturers to comply with national standards and EU food contact legislation such as Commission Regulation (EU) No 10/2011.
Related Standards
- EN 20105-A03: Grey scale for assessing staining, used for evaluating colour fastness results.
- EN ISO 186: Sampling techniques to ensure representative test specimens.
- EN ISO 3696: Specification for laboratory water used in testing.
- ISO 6588-2: Measurement of pH in aqueous extracts of paper and board.
- Commission Regulation (EU) No 10/2011: Food contact materials regulation including vegetable oils used as test fluids.
By adhering to EN 646:2018, organizations can confidently assess and certify the colour fastness of food contact papers and boards, ensuring safety, compliance, and high-quality packaging performance.
Frequently Asked Questions
EN 646:2018 is a standard published by the European Committee for Standardization (CEN). Its full title is "Paper and board intended to come into contact with foodstuffs - Determination of colour fastness of dyed paper and board". This standard covers: This document describes procedures for the testing of dyed paper and board intended to come into contact with foodstuffs. Some procedures depending on the foreseeable use of the material are given. Visual evaluation against a grey scale provides grading of the bleeding. For samples having significant different sides, a migration can occur from one glass fibre to the other and could lead to wrong interpretation of the fastness of one side. It is advisable to check these samples using large sampling procedure to prevent cross contamination of the glass fibre during the migration procedure. The procedure is described in Annex A. If lower limit of detection is required, this procedure could also be used.
This document describes procedures for the testing of dyed paper and board intended to come into contact with foodstuffs. Some procedures depending on the foreseeable use of the material are given. Visual evaluation against a grey scale provides grading of the bleeding. For samples having significant different sides, a migration can occur from one glass fibre to the other and could lead to wrong interpretation of the fastness of one side. It is advisable to check these samples using large sampling procedure to prevent cross contamination of the glass fibre during the migration procedure. The procedure is described in Annex A. If lower limit of detection is required, this procedure could also be used.
EN 646:2018 is classified under the following ICS (International Classification for Standards) categories: 67.250 - Materials and articles in contact with foodstuffs; 85.060 - Paper and board. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 646:2018 has the following relationships with other standards: It is inter standard links to EN 646:2006. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 646:2018 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2019
1DGRPHãþD
SIST EN 646:2006
Papir, karton in lepenka, namenjeni za stik z živili - Ugotavljanje obstojnosti barve
v obarvanem papirju, kartonu in lepenki
Paper and board intended to come into contact with foodstuffs - Determination of colour
fastness of dyed paper and board
Papier und Pappe vorgesehen für den Kontakt mit Lebensmitteln - Bestimmung der
Farbechtheit von gefärbtem Papier und Pappe
Papiers et cartons destinés à entrer en contact avec les denrées alimentaires -
Détermination de la solidité de la couleur des papiers et cartons colorés
Ta slovenski standard je istoveten z: EN 646:2018
ICS:
67.250 Materiali in predmeti v stiku z Materials and articles in
živili contact with foodstuffs
85.060 Papir, karton in lepenka Paper and board
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 646
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2018
EUROPÄISCHE NORM
ICS 67.250; 85.060 Supersedes EN 646:2006
English Version
Paper and board intended to come into contact with
foodstuffs - Determination of colour fastness of dyed paper
and board
Papiers et cartons destinés à entrer en contact avec les Papier und Pappe vorgesehen für den Kontakt mit
denrées alimentaires - Détermination de la solidité de Lebensmitteln - Bestimmung der Farbechtheit von
la couleur des papiers et cartons colorés gefärbtem Papier und Pappe
This European Standard was approved by CEN on 22 July 2018.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 646:2018 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle . 4
5 Materials and equipment . 5
6 Reagents . 5
7 Sampling . 5
8 Preparation of sample . 6
9 Procedure. 6
10 Test conditions . 6
11 Evaluation . 7
12 Test report . 7
Annex A (informative) Determination of the fastness of fluorescent whitened paper and
board on large samples . 8
A.1 Scope . 8
A.2 Preparation of large samples . 8
A.3 Test report . 8
Bibliography . 9
European foreword
This document (EN 646:2018) has been prepared by Technical Committee CEN/TC 172 “Pulp, paper
and board”, the secretariat of 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 May 2019, and conflicting national standards shall be
withdrawn at the latest by May 2019.
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.
This document supersedes EN 646:2006.
With regard to EN 646:2006 the following changes have been made:
a) Clause 1 “Scope” has been revised and extended;
b) in Clause 6 “Reagents” the test fluid “saliva simulant ” has been removed and the test fluid “alkaline
salt solution” has been introduced;
c) new test conditions, matching the use of the tested papers and boards have been included;
d) new definition for the glass fibre papers has been included;
e) evaluation against a grey scale only has been included;
f) editorial changes.
Attention shall be drawn to the fact that the glassfibre papers have not been duly validated before the
publication of this standard.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
This document describes procedures for the testing of dyed paper and board intended to come into
contact with foodstuffs. Some procedures depending on the foreseeable use of the material are given.
Visual evaluation against a grey scale provides grading of the bleeding.
For samples having significant different sides, a migration can occur from one glass fibre to the other
and could lead to wrong interpretation of the fastness of one side. It is advisable to check these samples
using large sampling procedure to prevent cross contamination of the glass fibre during the migration
procedure. The procedure is described in Annex A. If lower limit of detection is required, this procedure
could also be used.
2 Normative references
...
The standard EN 646:2018 provides a comprehensive framework for assessing the colour fastness of dyed paper and board products intended for contact with foodstuffs. The scope of this document effectively delineates the necessary procedures for testing, ensuring that manufacturers can accurately evaluate the safety and quality of their materials. One of the key strengths of EN 646:2018 is its detailed methodology for visual evaluation against a grey scale, which facilitates a consistent grading of bleeding. This visual assessment process is crucial for determining how dyed materials behave in real-world applications, directly linking to consumer safety and product integrity. Moreover, the standard acknowledges the complexities involved with materials that have significantly different sides, guiding users to be mindful of potential migration issues that could affect colour fastness verification. The inclusion of Annex A is particularly beneficial, as it outlines the best practices for larger sampling procedures, aimed at preventing cross-contamination during the migration testing process. This meticulous attention to detail enhances the reliability of results obtained from the testing processes outlined in the standard. Furthermore, the relevance of EN 646:2018 cannot be overstated, as it directly addresses the increasing regulatory demands related to food safety and consumer protection. By establishing robust testing protocols for paper and board materials in contact with food, the standard supports compliance efforts and assures stakeholders that the products meet essential safety criteria. Overall, EN 646:2018 stands out due to its thorough approach to assessing colour fastness in dyed paper and board. It not only safeguards consumer health but also bolsters industry standards by promoting best practices in material testing.
SIST EN 646:2019 표준은 식품과 접촉할 것으로 예상되는 염색된 종이 및 판지의 색상 내구성을 측정하는 절차를 자세히 설명하고 있습니다. 이 표준의 범위는 이하의 두 가지 주요 분야를 포함합니다. 첫째, 염색된 종이 및 판지가 실제 사용에 따라 어떻게 테스트되어야 하는지를 규명하며, 둘째, 시각적 평가를 통해 그레이 스케일에 대한 등급을 제공하여 탈색 현상을 효과적으로 평가할 수 있도록 합니다. 이 표준의 강점은 특히 서로 다른 면을 가진 샘플에서 이주가 발생할 수 있으므로, 잘못된 해석을 방지하기 위한 권장 사항을 제시하는 점입니다. 이러한 과정에서 큰 샘플링 절차를 사용하는 것이 권장되며, 이는 유리 섬유 간의 교차 오염을 방지하는 데 기여합니다. 이와 같은 세심한 관리와 절차는 사용자가 표준을 통해 높은 신뢰성을 가진 결과를 얻을 수 있도록 합니다. 또한, 이 문서에서는 탐지의 하한을 요구하는 경우에 대해 유용한 절차를 제공하여, 실험의 유용성과 정확성을 더욱 높이고 있습니다. 이러한 측면에서 SIST EN 646:2019 표준은 염색된 종이 및 판지가 식품과의 접촉에 적합한지를 평가하는 데 있어 매우 중요한 기준이 됩니다. 결론적으로, 이 표준은 식품 접촉 재료의 안전성을 확보하기 위한 기본적인 절차와 평가 방법을 제공하며, 다양한 산업 분야에서의 적용 가능성과 중요성을 가지고 있습니다.
Die Norm EN 646:2018 mit dem Titel „Papier und Pappe, die mit Lebensmittelstoffen in Berührung kommen sollen – Bestimmung der Farbbeständigkeit von gefärbtem Papier und Pappe“ stellt einen wichtigen Standard für die Lebensmittelindustrie dar. Diese Norm definiert Verfahren zur Prüfung von gefärbtem Papier und Pappe, die für den Kontakt mit Lebensmitteln vorgesehen sind, und behandelt damit ein entscheidendes Thema in Bezug auf Lebensmittelsicherheit und -qualität. Ein wesentlicher Schwerpunkt der Norm liegt auf der visuellen Bewertung anhand einer Grauskala, die eine systematische Einstufung der Farbausblutung ermöglicht. Diese Methode ist besonders relevant, um die Sicherheit und die Eigenschaften der Produkte zu gewährleisten, die im direkten Kontakt mit Lebensmitteln stehen. Die Norm berücksichtigt auch die spezifische Nutzung des Materials, indem sie unterschiedliche Verfahren vorschlägt, die je nach Anwendungsfall variieren können. Dies zeigt die Flexibilität und Anwendbarkeit des Standards in realen Szenarien. Ein weiterer entscheidender Aspekt der EN 646:2018 ist die Behandlung von Proben mit signifikant unterschiedlichen Seiten. Diese Thematik wird durch die Möglichkeit der Migration von Farbstoffen zwischen den Seiten angesprochen. Solch eine Migration könnte zu fehlerhaften Interpretationen der Farbbeständigkeit führen. Daher wird empfohlen, bei der Prüfung solcher Proben eine große Stichprobe zu verwenden, um Kreuzkontaminationen während des Migrationsverfahrens zu vermeiden. Diese Vorgehensweise wird detailliert im Anhang A beschrieben und trägt zur Validität der Testergebnisse bei. Die Norm EN 646:2018 ist von hoher Relevanz für Hersteller und Prüfinstitute, die sicherstellen möchten, dass die verwendeten Materialien den gesetzlichen Anforderungen entsprechen und keine gesundheitlichen Risiken darstellen. Durch die präzise und detaillierte Beschreibung der Prüfverfahren bietet der Standard eine zuverlässige Grundlage für die Qualitätskontrolle. Insgesamt stellt die EN 646:2018 einen unverzichtbaren Leitfaden für die Gewährleistung der Farbbeständigkeit von gefärbtem Papier und Pappe dar, die mit Lebensmitteln in Berührung kommen.
La norme SIST EN 646:2019 traite des papiers et cartons destinés à être en contact avec des denrées alimentaires, en particulier en ce qui concerne la détermination de la solidité des couleurs des papiers et cartons teints. Le champ d'application de cette norme est crucial pour assurer la sécurité alimentaire et la conformité réglementaire des matériaux utilisés dans l'emballage alimentaire. Parmi les points forts de cette norme, on note la méthodologie détaillée décrite pour le test des échantillons. Les procédures énoncées tiennent compte des usages prévisibles des matériaux, garantissant ainsi que les tests sont adaptés aux conditions réelles d'utilisation. De plus, l'évaluation visuelle contre une échelle de gris permet de classer efficacement la migration des couleurs, offrant ainsi une approche pratique pour les fabricants et les laboratoires d'essai. Un autre aspect majeur de la norme est la prise en compte des échantillons ayant des côtés significativement différents. La possibilité de migration entre les fibres de verre peut induire des interprétations erronées de la solidité sur un côté particulier. La norme conseille d'appliquer une procédure d'échantillonnage large afin de prévenir la contamination croisée, ce qui est essentiel pour obtenir des résultats fiables. L'inclusion d'une procédure à cet égard dans l'Annexe A renforce la rigueur scientifique de cette norme. La pertinence de la norme SIST EN 646:2019 ne peut être sous-estimée dans le contexte actuel où la sécurité alimentaire est primordiale. Elle s'inscrit parfaitement dans les exigences réglementaires de l'industrie, garantissant ainsi que les produits en contact avec les aliments respectent les normes de sécurité et de qualité attendues. Cette norme représente donc un outil indispensable pour les professionnels du secteur, leur permettant d'assurer la qualité et la sécurité des matériaux d'emballage alimentaires.
EN 646:2018は、食品と接触することを意図した紙およびボードの色落ち耐性を評価するための標準化された手順を提供しています。この文書は、染色された紙とボードのテスト手順を詳細に説明しており、特にそれらの材料がどのように予測される使用に依存するかについて言及しています。 この標準の強みは、色の耐久性を測定するための視覚評価手法が明確に定義されている点です。グレースケールを用いた評価方法によって、色の移行を格付けすることができ、具体的な数値で色落ちの度合いを把握することが可能です。これにより、食品業界で使用される材料が求められる基準に適合しているかを簡単に判断することができます。 また、片面に明確な差異があるサンプルについては、ガラス繊維間での移行が発生する可能性が示されており、この点を考慮した手順が記載されています。特に、交差汚染を防ぐための大規模なサンプリング手法を用いることが推奨されているため、実践的なデータ収集の重要性が強調されています。このように、詳細な設定や注意点が文書内で明記されていることは、ユーザーにとって非常に価値のあるガイドとなっています。 さらに、検出限界を低く設定する必要がある場合でも、提案された手順を使用することで、適切な評価が可能であることが示されています。これにより、より厳密な品質管理が行えるため、食品業界における安全性の向上が期待できます。 EN 646:2018の関連性は、食品包装業界における規制遵守や品質保証の観点からも極めて高いと言えます。食品と接触する材料の選定は、消費者の安全に直結するため、本標準はその重要な基盤を提供しています。全体として、この標準化文書は、染色された紙およびボードの色落ち耐性の評価において不可欠なフレームワークを確立しており、業界における実践的な指針を提供しています。
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