Paper and board. Determination of opacity (paper backing). Diffuse reflectance method has-corrigendum 6) Actions on implementation

6) Actions on implementation

BS EN 13509 deals in particular with the measurement of the structure to electrolyte potential

3 Qualification of valves by nominal size

enabling structural integrity and usability in agricultural applications

This document is not applicable to tanks used for storage and/or supply of fuel/gas for building heating/cooling systems

Paper and board. Determination of opacity (paper backing). Diffuse reflectance method has-corrigendum 6) Actions on implementation1 Scope This International Standard specifies a method for the determination of the opacity (paper backing) of paper by diffuse reflectance. It can be used to determine the opacity of papers or boards which contain fluorescent whitening agents, provided the UV content of the radiation incident on the test piece has been adjusted to conform to that in the CIE illuminant C using a fluorescent reference standard provided by an ISO TC 6 authorized