Flowing Blue was first made in Staffordshire England about 1825. While cobalt blue underglaze could withstand the heat of the kilns, many glazes containing lead oxide provided characteristic flow blue wares its characteristic depth of colour and brilliance.
Colours Flowing
The stone china base of Flowing, Flow, or Flown Blue differed from the soft-based pottery base lighter-toned china. The flowing colour was produced by the reaction of volatile chlorides upon ceramic colours. The colours and designs are applied to the pottery surface are exposed to a chlorinated atmosphere in the kiln and the vapors cause the colour to spread and blur--thus flow blue.
The Bristol-style glazed jar fragment:
The Bristol-style glazed bottles were developed by the Powell family in Bristol in 1835. The texture of the ware was coarse to moderately coarse. The ware was characterized by a buff-coloured fabric and a clear, glossy glaze. The upper part of the vessel was dipped in an iron oxide glaze, producing a caramel colour on the upper part of the vessel. The most common vessel forms were beverage bottles and preserve/condiment jars.
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