# Council Directive of 15 December 1969 on the approximation of the laws of the Member States relating to crystal glass (69/493/EEC), Division 2.2: Refractive index

Extent: E+W+S+N.I.

The index is measured on the refractometer to within ± 0·001.

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Source: https://www.legislation.gov.uk/eudr/1969/493/annex/II/division/2/division/2.2 (the official version)
Page: https://openlegislation.uk/eu-directive-1969-493/annex-II/division-2/division-2.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.