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ISO 8791-4:2021
Paper and board - Determination of roughness/smoothness (air leak methods) - Part 4: Print-surf method
This document specifies a method for determining the roughness of paper and board using an apparatus which conforms to the Print-surf method, as defined in this document. It is applicable to all printing papers and boards with which it is possible to form a substantially airtight seal against the guard lands of the measuring head.
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International Organization for Standardization [iso]
International Organization for Standardization [iso]