Rare Patty Pan, Isleworth, soft paste porcelain, c.1768
This patty pan is painted in underglaze blue with a Chinese style pattern. The centre is painted with a large stylised flower surrounded by smaller trailing flowers and foliage. Three single flower heads with trailing foliage are arranged around the inside edge, beneath a dotted-trellis border. The outside is painted with three herbal sprigs.
Provenance: With Roderick Jellicoe, London. Private Collection, London.
Both the glaze and underglaze cobalt blue pigment of this piece have been tested using X-Ray Fluorescence Spectroscopy (XRF). The results, published in the English Ceramic Circle Transactions, vol. 28, 2017, reveal that the cobalt blue contains nickel. This is significant as 10 out of 10 of all confirmed Isleworth pieces contain nickel, as do all 36 of the possible Isleworth pieces tested. Compare this with the results for Bow, where no nickel is present in the cobalt blue pigment.
Condition: The glaze ran during the manufacturing process causing an area of the blue decoration to blur. Tiny stilt marks are visible on the rim. Characteristic poor translucency. No damage or restoration.
Dimensions: Diameter 10.1 cm
Transactions, vol. 28 (English Ceramic Circle, 2017). See the entry for item no. 2015-04 103, page 21.
Isleworth Pottery and Porcelain: recent discoveries (English Ceramic Circle and Museum of London, 2003).
Godden's Guide to Blue and White Porcelain, Geoffrey A. Godden (Antique Collectors' Club, 2004).
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