The Book of KellsIona(?), an Irish monastery on the west coast of Scotland, circa 800
Text in Insular Majuscule
Library of Trinity College, Dublin (Ireland)
Date of Publication of the Facsimile: 1951
Heliogravure is a sophisticated process involving the effect of light on certain chemicals, by which the photographed image is transferred to the printing plate in such a way that the printing surface is sunk below the surrounding portions of the plate. Printing with this method requires special care, but good quality photogravure yields a very close copy of the photograph. The quality of the original photograph is also a determining factor in the end result.