# The Aerosol Dispensers Regulations 2009, Paragraph 6.3.3.2.2


The watch-glass is placed on a fire-resistant surface within a draught-free area that may be ventilated after each test. The graduated scale is positioned exactly behind the watch-glass and held vertically by means of a support and clamp.

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Source: https://www.legislation.gov.uk/uksi/2009/2824/schedule/1A/paragraph/6.3.3.2.2 (the official version)
Page: https://openlegislation.uk/aerosol-dispensers-regulations-2009/schedule-1A/paragraph-6.3.3.2.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.