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Knight's Mechanical Encyclopedia (ed. Knight) 3 1 Browse Search
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Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
d inks to ornamental borders, and to notes, bonds, checks, etc., to prevent forgery. Vizitelly and Branston, and subsequently Baxter, attained considerable excellence. See chromo-lithography. The invention patented some years ago by Mr. Charles Knight, of London, is a process whereby fac-similes of designs in four colors are produced on the same sheet before it leaves the press, by means of a revolving carriage or bed, upon which the blocks are secured. A mode of printing in four colors by means of turning the tympan with the sheet secured on it was somewhat less complicated than Mr. Knight's. The processes, however, necessitated the application of the four colored inks at every revolution and impression, and also involved considerable outlay for machinery. In Carpenter's process everything is carried on in as straightforward a manner as in ordinary black printing. It may be thus briefly described: — A form is set up by the compositor; he then divides it into four secti