SCHEDULEAuthorised Fuels
41
Supertherm II briquettes, manufactured by Coal Products Limited at Immingham Briquetting Works, Immingham, North East Lincolnshire, which—
a
comprise anthracite (as to approximately 36 to 51% of the total weight), petroleum coke (as to approximately 40 to 55% of the total weight) and an organic binder or a molasses and phosphoric acid binder (as to the remaining weight);
b
were manufactured from those constituents by a process involving roll-pressing;
c
are unmarked ovoids;
d
have an average weight of 140 grams per briquette; and
e
have a sulphur content not exceeding 2% of the total weight.