Paper and board. Determination of opacity (paper backing). Diffuse reflectance method1 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

Machines with rotary crescent (sickle) or circular blade fixed to a shaft with oscillating movement and horizontal manual loading

Compliance with this standard provides one means of conformity with the specified essential requirements of the Medical Devices Directive concerned

BS 6712-2 on hygroexpansion measurement of paper and board is useful for:

BS ISO/IEC 14888 specifies a variety of digital signature mechanisms with appendix for messages of arbitrary length

PD IEC TR 62357‑2 Identifies in existing standards

of the group delay (ps) induced by the spectral content of light propagating through an optical element or fibre

specifies requirements for the migration or content of certain hazardous organic chemical compounds from/in certain toys and toy materials by the following exposure routes:

BS EN 10293:2005 covers steel castings for general engineering uses

This standard can be applied nationally and internationally

h)      Technological aspects including safety

d) when and how to undertake Further Testing as part of factory production control

Environmental Auditors