When the ware is ready for firing, it is placed in clay cases, called saggars, which vary in size and shape according to the articles placed in them. The saggars are put into an oven, shaped like a bee-hive, with an opening at the top; there is also an opening at the side to admit the saggars, but this is closed before the fire is applied. Each saggar is luted to the other by a roll of soft fire-clay; this secures the vessels contained in them from dust, the fumes of the fires, and from the effects of the air when the oven is cooling. The fires which heat the oven are placed round it in proper receptacles, which communicate with the interior of the oven by flues, heating every part equally. This first firing gives a higher degree of heat, and is continued much longer than any successive firing; when once fired, the article is called biscuit ware. The cream coloured, or queen's ware is now carried to the dipping-house, to receive its glazing; that which is to be printed blue is taken to the printing-house.