# The Smoke Control Areas (Authorised Fuels) Regulations 1991, Paragraph 9

Extent: E+W+S
Status: prospective

Extracite briquettes, manufactured by Sophia-Jacoba Handelsgesellschaft mbH at Hückelhoven, Germany, which—
(a) comprise anthracite duff (as to approximately 95.5 per cent of thetotal weight) and ammonium lignosulphonate lye as binder (as to theremaining weight);
(b) were manufactured from those constituents by a process involvingroll-pressing and heattreatment at about 260°C;
(c) are cushion-shaped briquettes with a silvery appearance and aremarked with the letters“S” and“J” and have an average weight of 40 grammes; and
(d) have a sulphur content of approximately 1.2 per cent of the totalweight.

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Source: https://www.legislation.gov.uk/uksi/1991/1282/schedule/1/paragraph/9 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-regulations-1991/schedule-1/paragraph-9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.