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

6) Actions on implementation

measurement by instrumentation

This document gives guidance on the development and construction of hydrogen-fired gas appliances

9 on Water quality are useful for:

3 Qualification of valves by nominal size

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