[F18A. Brazier briquettes, manufactured by Coal Products Limited at Immingham Briquetting Works, Immingham, North East Lincolnshire, which—N.I.
(a)comprise anthracite (as to approximately 60 to 80 % of the total weight), petroleum coke (as to approximately 10 to 30% of the total weight), and a molasses and phosphoric acid binder (as to the remaining weight);
(b)were manufactured from those constituents by a process involving roll-pressing and heat treatment at about 300°C;
(c)are either unmarked pillow-shaped briquettes, or pillow-shaped briquettes marked with a single indented line running longitudinally along each face, off-set from its counterpart by 10mm;
(d)have an average weight of either 55g or 80g per briquette; and
(e)have a sulphur content not exceeding 2% of the total weight on a dry basis.]
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