International Organization for Standardization (ISO)
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IWA 8:2009
Scope
This International Workshop Agreement establishes requirements for the use of the glass designations “clear
glass” and “ultra-clear glass” for non-coloured glass items according to their clarity and iron content. This
International Workshop Agreement specifies a procedure for measuring the clarity of glass items by means of
a spectrophotometer.
This International Workshop Agreement is applicable to
⎯ mineral glasses, and
⎯ glass items where a part is not covered by coating or decoration, and is therefore available for sampling.
This International Workshop Agreement is applicable to the use of glass as tableware, giftware, jewellery and
luminaries.
This International Workshop Agreement is not applicable to the use of glass in the context of building,
containers, medicine and laboratories, and to other technical uses of glass.
IWA 8:2009 history
2009IWA 8:2009 Tableware, giftware, jewellery, luminaries — Glass clarity — Classification and test method