Smithsonian Report, 1931. Kainen 



Plate 1 1 



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• « a C • J 



1. Modern relief halftone. Detail of plate 12, greatly enlarged, showing dots of different 

 sizes but even intensit\' of color. 



2. Rotary photogravure by Karl Kli?. Detail ul plaic 7, figure 1, greatly enlarged, ii.y'.Mnt 

 square dots of equal size but varying depths of ink. Also shown is bleeding of ink. in 

 darker areas, which contributes to continuous tone effect. 



