# The Smoke Control Areas (Authorised Fuels) Regulations 1991, Paragraph 18

Extent: E+W+S
Status: prospective

Supertherm briquettes, manufactured by Thermac Fuels Limited atShildon, County Durham, which—
(a) comprise a blend (in the proportion of 19:1) of anthracite andmedium volatile coal (as to approximately 93 per cent of the totalweight) and cold-setting organic binder (as to the remaining weight);
(b) were manufactured from those constituents by a process involvingroll-pressing;
(c) are unmarked ovoids and have an average weight of 160 grammes; and
(d) have a sulphur content not exceeding 1.5 per cent of the totalweight.

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Source: https://www.legislation.gov.uk/uksi/1991/1282/schedule/1/paragraph/18 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-regulations-1991/schedule-1/paragraph-18
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.