Other than the basic exposure factors of intensity and time, there are other factors to consider in printing equipment. Some of these considerations are as follows:

Quality of the lens

Color temperature of the light source used for printing

Corrective filters

Accuracy of the enlarger timer

Stability of the power (voltage) supply

Ease of operation in total darkness

A good quality enlarger is required to produce high-quality color prints. Color enlargers used in Navy imaging facilities are diffusion type of enlargers. Like all image-forming equipment, the lens is an integral part of the enlarging system. The lens used in a color enlarger must be free of chromatic aberration; that is, it must be a color-corrected lens.