CEN/TC 172/WG 4 - Dirt and shives in pulp and paper
To provide the specification of the objects to be considered as dirt and shives and to draft European standards for the estimation of the amount of dirt and shives in pilp and paper.
Dirt and shives in pulp and paper
To provide the specification of the objects to be considered as dirt and shives and to draft European standards for the estimation of the amount of dirt and shives in pilp and paper.
General Information
Frequently Asked Questions
CEN/TC 172/WG 4 is a Working Group within the European Committee for Standardization (CEN). It is named "Dirt and shives in pulp and paper" and is responsible for: To provide the specification of the objects to be considered as dirt and shives and to draft European standards for the estimation of the amount of dirt and shives in pilp and paper. This committee has published 1 standards.
CEN/TC 172/WG 4 develops CEN standards. The scope of work includes: To provide the specification of the objects to be considered as dirt and shives and to draft European standards for the estimation of the amount of dirt and shives in pilp and paper. Currently, there are 1 published standards from this working group.
The European Committee for Standardization (CEN) is a public standards organization that brings together the national standardization bodies of 34 European countries. CEN provides a platform for developing European Standards (ENs) and other technical documents in relation to various products, materials, services, and processes, supporting the European Single Market.
A Working Group in CEN is a specialized group responsible for developing standards or technical work within a defined scope. These bodies bring together international experts to create consensus-based standards that support global trade, safety, and interoperability.
This European Standard specifies the test method for the estimation by reflected light of the visible contraries in paper. Visual inspection is applicable to most kinds of paper and board. Paper and board with an apparently high content of contraries require to be inspected by instrumental means as described in Annex B, as the tedium of large counts diminishes the judges' precision. However, papers which are not flat, have a low lightness (value below 30 %) and contain holes that may cause particular problems for instrumental techniques (see Annex B).
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