BLUE 



BLUE 



Color Photography Explained 2 



The first step in reproducing a print on paper is to sep- 

 arate the color positive made in the camera into its three re- 

 spective elements, namely its orange-red element, its green element 

 and its blue-violet element. This is done by photographing the color 

 positive successively through glasses covered with colored gelatine 

 corresponding to the three primary colors. For reasons which 

 will be explained later, the printing is made not in the 

 primary color but in its complementary color. This 

 picture shows the negative made by the 

 orange-red separation filter, printed in 

 its complementary blue-green. 



