Detail
London decorated antique porcelain

A charming Chinese saucer with an underglaze blue and white pattern which has been decorated in London in iron red  to simulate Japanese imari..
The saucer c.1720, the decoration c.1730-40
D: 4.6", 11.6 cm
Provenance: Watney Collection

Ref: Stephen Hanscombe; The Early James Giles China and his Contemporary London Decorators for a discussion of these wares.

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Fashion had changed and blue and white was not as popular as the red and blue of the Japanese imari porcelains, hence this was decorated to heighten its appeal.