Plate-glass. A superior kind of thick glass, used chiefly for mirrors and for large windows.

Plate-jack, O. E. Coat armour.

Plate-marks. (See Hall-marks.)

Plate-paper is a thick soft paper expressly prepared for printing engravings upon.

Platea, Gr. and R. (πλατεῖα, i. e. broad). A wide fine street in a city, in contradistinction to a small street called angiportus, which means literally a narrow street.

Platen. Of a printing-press, the flat part by which the impression is made.

Plateresca, Sp. A name given to goldsmiths’ work of the 14th and 15th centuries, which reflected the complicated and delicate forms of ornament applied in the pointed architecture of the period.

Plates are properly illustrations taken from copper or steel engravings; cuts are impressions from wood-blocks.

Platina. Twisted silver wire.

Platina Yellow. Two pigments, one of a pale yellow colour, the other resembling cadmium yellow, are sold under this name.