Identifier: halftoneprocessp00verf (find matches)
Title: The half-tone process. A practical manual of photo-engraving in half-tone on zinc, copper, and brass
Year: 1904 (1900s)
Authors: Verfasser, Julius
Subjects: Photoengraving
Publisher: London, Iliffe & sons, limited
Contributing Library: Getty Research Institute
Digitizing Sponsor: Getty Research Institute

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
'
Text Appearing After Image:
lb THE HALF-TONE PROCESS. happened to be in a light or a shadow, so that whenthe negative was printed the print would be simplycovered with black lines, and the picture only im-perfectly seen through them. As a matter of fact, however, by suitable manipula-tion, which it is the object of this book to describe,the image is broken up into dots which are of varyingsize but of equal density—just the opposite to whatwe have been led to expect, but an effect which exactlysuits our purpose. Let us stop to consider for a moment what werequire in a relief block for letterpress printing. Itmust present a level surface to the inking rollers andthe impression cylinder. We cannot roll more inkon the darker shades of the engraving, and less inkon the lighter parts ; the ink rollers deposit an evenfilm of ink on the block. But if the lights of thepicture are hollow spaces and the shadows are solidparts, level with the surface, whilst the half-tones areformed of dots of varying degrees of fineness,

Note About Images