These were made in a similar way, but instead of stamping the design into the tile, the clay was pressed into a mould with the design in relief at the bottom.Once the tile was removed from the mould, the indentations could be filled with a contrasting clay.For most people, 'delftware' conjures up images of the blue and white pottery made in the Dutch town of Delft.The term in fact describes all 'tin-glazed earthenwares' made in the Netherlands and the British Isles. By the 14th century, fleets of Venetian ships appeared in the English Channel every year, carrying cargoes of maiolica bound for England, France and the Netherlands.Tin-glazed earthenware, which normally has a white glaze and painted decoration, has been produced in many countries and has many different names. These ships were known as Flanders galleys, and it is doubtless from this name that 'galleyware' the original English term for tin-glazed earthenware, derives.Although production of tin-glazed earthenware began in the Netherlands and England in the 16th century, it was not actually made in Delft until around 1600.
Marks like the Chelsea anchor or the crossed-swords of Meissen are well known (and were often pirated), while the significance of others is uncertain.
The most recent theory is that they were made with clay imported from Virginia by two of the partners in the Bow porcelain factory.
If so, the 'A' might refer to George Arnold, a sleeping partner in the firm.
The first passable substitutes to be made in England appeared in the 1740s, and these were also called ‘china-wares’ to distinguish them from ordinary earthenwares.
Animal bone ash was first added to porcelain at the Bow factory in the 1740s, but its use in a hard-paste mixture was favoured by Josiah Spode in the 1790s, just as the importation of Chinese porcelain ceased to be significant.