EN 646:2018

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
...