PRINTING PROCESSES 

 Table V. — Reducing and Enlarging Tables 



433 



Upper numbers of pairs are distances of lens from easel in enlarging or from lens to photo being 

 reduced in copying. Lower numbers of pairs are distances from lens to negative being enlarged or 

 camera extension for reduction. The cap end of lens should face bromide paper in enlarging and in 

 reducing should face object being copied. 



Diffusion enlargers are simpler to construct and to operate than condenser systems. 

 The loss of light in the diffusion means may be considerable and may prolong exposures 

 appreciably. In general the lack of light efficiency is not too important, because of 



