<< To determine dot gain, first output the Photoshop
B/W Calibration wedge using the selected output device (imagesetter,
desktop printer) on clear film and then print the wedge using each of
the UltraStable films (CMYK). Compare the printed densities with the
file densities and compensate by entering the dot gain data into the
Transfer Function of the Page Set-up.
>>
How does one get the values for the printed densities? The file densities are
percent ink for CMYK (0 to 100) wherease if one measures the printed
densities using a densitometer, logarithmic densities (0 to about 2.1) are
obtained.