De Wild, John H · Minneapolis : Northwest Commercial Bulletin and Hardware Trade · leaf 30
sensitized plate, when the exposure is made. For coarse printing, newspaper work, etc.,a 65-line or 85-line screen is used. Thismeans that there are 65 lines or 85 lines tothe inch running two ways across the sur-face, or in other words 65x65 or about 4,000small dots to a square inch. For… … These dots are necessary in printing, andare formed from what is known as a screenwhen the engraver exposes his plate for themaking of the cut. This screen is a finely ruled glass witha large number of lines running across itsface. This is placed before the engravers or pen and ink drawing. These…
