Calvert, F. (Frederick) Crace', 1819-1873, Stenhouse, John, Groves, Charles Edward, 1841-1920 · Manchester : Palmer & Howe · leaf 114
ey are placed in troughs inwhich a copper roller dips, having engraved upon it thedesign or pattern to be printed. The excess of mordant isremoved as it leaves the solution by means of a sharpblade of steel, gun metal, or German silver, called adoctor, leaving the mordant on the engraved parts… … Fig. i. By an ingenious arrangement several rollers can bemounted in the machine (as many as twenty have beenused), so that a piece may receive successively mordantsfor different colours and of various strengths, which after-wards produce the various tints and shades which the PRINTING MORDANTS. 77…
Dyes and dyeing · Calico-printing
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