Cyan, Yellow, and Black inks were all being used to create deep greens.
• Worming
may look similar to mottling, but it occurs within the dither pattern of the
printer. Larger, often worm-like, shapes may occur in the printer’s dithering pattern in
certain flat color patches. This is a function of the printer’s dithering algorithm, and
while it may appear that profiles improve or worsen worming, they really only move it
from one place to another. If the place they move it to is not part of the test image, it
may appear to have been eliminated, but a different set of flat color patches could
make it reappear. Worming effects only flat color areas, so typically does not cause
problems in photographic images, unless flat areas such as clear skies display the
problem. Again: dithering based issues cannot be caused or cured by profiling, or even
printer settings, unless you are using a driver that offers multiple dithering choices, in
which case testing the dithering options may produce a choice that minimizes this
problem.
Worming artifacts in a printer’s dithering patterns.
•
Bronzing
is an effect that can be caused by excess ink in the near blacks. Bronzing
shows as a difference in color tone between black and near black areas of a print when
viewed at an angle to the light source, often showing a bronze sheen. In some cases
the only solution to bronzing is choosing a different paper or inkset, in other cases, a
lighter inking media setting can improve results.
