Slipware is essentially a type of decoration, a
runny fine clay mixture is applied to clay either by painting, splashing or
dripping, once it is leather hard. Sometimes the rather fabulously termed
engobe (a white or coloured slip) is applied. The most common slip technique
was slip-trailing, in which patterns were drawn by dripping slip through a
cow’s horn or similar device.
‘In the London area, slip-decorated pottery was
used from the 16th century onwards, inheriting a tradition for using
decoratively slips of different colours that has its origins in the 12th
century. The products of local potteries and imported wares from as far away as
Devon, Somerset, the Midlands, the Netherlands, Germany and Italy all found a
place in the London market, where they provided some of the most attractive and
affordable, decorated household ceramics available between the 16th
and 18th centuries.’ (Museum of London)
I spot a piece of slipware on every trip to the
Thames foreshore. As I laid out the slipware I’d collected, the
one type I thought I had suddenly transmuted into a confusing multitude. I’d
previously identified the bakewell tart lookalike Staffordshire combed slipware 1680- 1770 and marbled ware, these are quite straight
forward , kept in a separate box and covered in a previous post.
Both groups looks very old. One set is dark brown almost black from afar with rather attractive raised trails of cream
slip, often partially worn, I presume by the Thames. The clay bodies are brick
red. The two lower dark brown pieces differ in three respects, the white slip,
colour of the clay in one case white the other pinkie and the glaze only
covers the top.
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| Mudlarking on the Thames: Slipware pottery finds |
The next lot have an orangey red clay body. The background is lighter brown, the trailed slip appears more yellowy and the
slip is different in style.

The brown I’ve discovered is a brown ‘ground’
formed by applying a slip over the clay. I’m assuming a number of these pieces
are 300-400 years old Metropolitan slipware, the most common slipware in London
it was produced 17 miles away in Harlow
Essex. London was the obvious market, hence the name, mainly trailed white slip
under a thick glossy clear glaze, which renders the white yellow. Clay with a
high iron content varied in colour from light brown to bright red orange to
darker red brown, with some thicker forms having a grey core. Some say only clear
glaze was used, others suggest it could also be a ginger brown. Apparently it
rarely extended over rim edge. The original objects were mugs, cups,
candlesticks, chamber pots, salts and chaffing dishes. Vessels were wheel
thrown, with heavy knife-trimming often apparent on open forms such as dishes.
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| Metropolitan Slipware Mug (Museum of London) |
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| Metropolitan Slipware Dish 1630- 1700 (Museum of London) |
Alternatively one or both collections may in fact be London redware with major industries around Woolwhich and Deptford from late 17th – 18th centuries. I’ve also read slipware was produced in Wrotham Kent.