By the early 19th century, most Georgian and Victorian coal-burning fireplaces had a cast iron hob grate with iron surfaces to one or both sides of the grate.
Most rooms had a fireplace, though those in the bedrooms were rarely used.
typical early 19th century hob grate
Some designs were available over for several decades and even in the late 19th century.
The grate was polished to a dull sheen using black lead. This was applied very sparingly and then polished vigorously. An alternative was a thin coat of matt black paint, a coating of wax, and then polished.
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