11. Charglow briquettes, manufactured by Polchar Spolka z ograniczona odpowiedzialnoscia Ulica Kuznicka 1, Police, Zachodniepomorskie, Poland, which—
(a)comprise bituminous coal char (as to approximately 45 to 95 per cent of the total weight), anthracite (as to approximately 0 to 20 per cent of the total weight), petroleum coke (as to approximately 0 to 20 per cent of the total weight), bituminous coal (as to approximately 0 to 10 per cent of the total weight) and an organic binder (as to the remaining weight);
(b)were manufactured from those constituents by a process involving roll-pressing and heat treatment at about 110°C;
(c)are unmarked pillow-shaped briquettes;
(d)have an average weight of 100 grammes per briquette; and
(e)have a sulphur content not exceeding 1.5 per cent of the total weight.