Paragraph 51 I1

comprise anthracite fines (as to approximately 40 to 70% of the total weight), petroleum coke (as to approximately 20 to 45% of the total weight), char (as to approximately 0 to 10% of the total weight), bituminous coal (as to approximately 5 to 30% of the total weight) and an organic binder or a molasses and phosphoric acid binder (as to the remaining weight);

were manufactured from those constituents by a process involving roll-pressing;

have a volatile matter content in the finished briquette of neither less than 9% nor more than 15% of the total weight on a dry basis;

are unmarked hexagonal briquettes;

have an average weight of 140 grams; and

have a sulphur content not exceeding 2% of the total weight.