comprise anthracite duff (as to approximately 95.5% of the total weight) and ammonium lignosulphonate lye as binder (as to the remaining weight);

were manufactured from those constituents by a process involving roll-pressing and heat treatment at about 260°C;

are cushion-shaped briquettes with a silvery appearance and are marked with the letters “S” and “J”;

have an average weight of 40g per briquette; and

have a sulphur content of approximately 1.2% of the total weight.