Once the basic filter pack is determined for a typical negative, the same exposure conditions can be used on future prints, providing the same types of film and paper are used. A proof sheet can provide a convenient aid in printing color negatives. The same technique used for making black-and-white proof sheets on an enlarger is used for making color proof sheets. Except when you are making color proof sheets, the enlarger height and lens-to-easel distance should be kept constant. When you are making an 8x10 enlargement from each negative, the same enlarger height that produces an 8x10 print should be used. When you must change the enlarger height from the negative previously printed, adjust the lens opening to compensate for the difference in illumination.

Assuming the exposure level for the contact prints is correct, exposures will be about the same when the negatives are placed in the negative carrier and enlarged. Some minor adjustments may be needed, however, to provide the highest quality print possible. Navy imaging facilities strive for a color balance within 05CC-because the perfect color print is very subjective. In most color prints, a slight color to the warm side is more acceptable than color prints with a slight color cast to the cold side. This is particularly true when the subject in the photograph involves people.

Incidentally, you should not discard the test prints. Instead, write on them the actual exposure conditions and your predicted changes to the test print. These records will help you to gain the greatest practical value from past work and to develop the judgment needed for easier color printing in the future.