Glass in the United Kingdom had been taxed by weight, and when this tax was repealed in 1845 it became profitable to produce runs of identical moulded items, and the demand for domestic glassware grew. New ranges were produced each year, and as well as the traditional clear, (or flint) glass, many other styles were developed, such as opaque, marbled, opalescent and coloured.
The moulds were made from cast iron or brass, and later precision power-assisted tools became available to cut the patterns on the moulds. The earliest known English example dates from 1836, but the industry really came into its own in the 1850s, the height of the Victorian period.