Pappersteknik

Contains requirements for unprinted archival paper intended for documents and publications required for permanent retention and frequent use. For these purposes paper of high performance and high durability is required.

Specifies the requirements for permanent paper intended for documents given in terms of minimum strength measured by a tear test, minimum content of substance (such as calcium carbonate) that neutralize acid action measured by the alkali reserve, maximum content of easily oxidized material measured by the kappa number, maximum and minimum pH values of a cold water extract of the paper. Is applicable to unprinted papers. Is not applicable to boards.

This International Standard specifies a method for the determination of the flat crush resistance of corrugated fibreboard used in the manufacture of shipping containers. This International Standard is applicable to single-faced and single-wall (double-faced) corrugated fibreboard. This International Standard is not applicable to double-wall (double-double-faced) corrugated fibreboard and to microflute corrugated fibreboard, since the end-point of the test is not clearly defined or observable.

This part of ISO 5267 specifies a method for determination of the drainability of a pulp suspension in water in terms of the "Canadian Standard" freeness in millilitres.

In principle, this method is applicable to all kinds of pulp in aqueous suspension.

NOTE Treatments which produce a large proportion of fines may induce an anomalous rise in freeness (false freeness), as a rule at values below 100 ml.