There isn’t much available on the net on this stuff so hard to craft a clear story. At the moment I have a number of rather general leads. Quite amusing that all blackware means is that the pottery is black – or perhaps it’s nice that the archaeologists can be quite straight forward and dispense affectation.
Cambridge University archaeologists describe blackware as ‘Made between 1580 and 1700AD. The clay is very similar to that of Colchester Ware and Glazed Red Earthenware, but the vessels have a black glaze, coloured by the addition of iron. Usually drinking vessels such as mugs, but also tall, narrow cups with up to eight handles, known as 'tygs'.
|Black Glazed Earthenware Tyg 1590-1700 probably from Harlow (St Alban's Museum)|
One source claims that this glaze was more expensive to make because they needed more fuel than low fired earthenwares (I presume either higher temperatures or a longer firing in the kiln).
Kathryn Kane on her blog Regency Redingote has done a nice bit of research on tygs,