Vocational Printing

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 Excerpt: ...melted over to be cast into new matter. The Monotype is used in many printing plants for the composition of books, tables and tariffs, and the body matter of some newspapers and magazines. CHAPTER XIII Engraving and Embossing Besides the method of printing from movable types, which is commonly known as letter-press ... Read More

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 Excerpt: ...melted over to be cast into new matter. The Monotype is used in many printing plants for the composition of books, tables and tariffs, and the body matter of some newspapers and magazines. CHAPTER XIII Engraving and Embossing Besides the method of printing from movable types, which is commonly known as letter-press printing, other kinds of printing are done by means of engraved plates known as engraving and embossing. COPPER-PLATE ENGRAVING The process of copper-plate engraving was accidentally discovered by a metal engraver of Florence in the fifteenth century. This man had completed the engraving of a silver plate for a church altar and accidentally spilled some chemical onto the work. Immediately he pressed a piece of paper against the engraving to remove the fluid and in this way he obtained an impression of it. Realizing the value of this discovery, he cut various religious pictures in reverse on copper and obtained impressions of them with the use of a crude black ink and paper. The practice of copper-plate engraving rapidly spread through Europe, and the method of doing the work become more perfect. The engraving of the plate is done by hand. Usually no drawing or sketch is made, the matter to be printed being marked on the plate freehand and backward. In the printing the entire surface of the plate is covered with ink, and the surplus is then wiped off with a rag, care being taken not to pull the ink out of the engraved depression. Then the balance of the ink on the surface is polished off with the bare hand. The sheet of paper is laid on the plate, which passes under heavy rollers, causing the paper to be forced down into the cuts so that the ink adheres. The best results are obtained on heavy, soft paper. Hard polished papers do not print well, an... Read Less