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Paper and board intended to come into contact with foodstuffs - Determination of colour fastness of dyed paper and board
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NORM herausgegeben am 1.6.2019
Bezeichnung normen: ČSN EN 646
Zeichen: 500487
Katalog-Nummer: 507704
Ausgabedatum normen: 1.6.2019
SKU: NS-950486
Zahl der Seiten: 12
Gewicht ca.: 36 g (0.08 Pfund)
Land: Tschechische technische Norm
Kategorie: Technische Normen ČSN
Materials and articles in contact with foodstuffsPaper 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
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