Assertion: matrix | /r/HasProperty | inserted into the bottom of a hand mould
Facets:
value: in "cold metal" typesetting
type: OTHER
value: in letterpress
type: LOCATION
Source sentences:
text: In letterpress or "cold metal" typesetting, used from the beginning of printing to the late nineteenth century, the matrix of one letter is inserted into the bottom of a hand mould, the mould is locked and molten type metal is poured into a straight-sided vertical cavity above the matrix.