Konica Minolta bizhub PRESS C1060 - Manual (Page 194)

Parameter Option Description
Trapping Enable
trapping Applies trapping to your job.
Trapping is a solution that solves misregistration between color
separations in both offset and digital printing. Misregistration can
occur regardless of a printing device's accuracy and results in white
lines around objects on top of a background (in a knockout) and also
between adjacent colors.
Note: If you don't select this option, it does not affect trapping
incorporated in DTP software—for example, Photoshop. The IC-309
print controller trapping should not be used with the trapping options
included in DTP software. In a PostScript file that already contains
trapping from the originating application, it is not necessary to use
IC-309 print controller trapping.
Provides the following options:
● Frame thickness—Enables you to set a value for the thickness
of the trapping frame. The thicker the frame, the less chance that
white areas appear between images.
● Protect small text—Does not frame text that is 12 points or less
when the trapping algorithm is applied. You can use this option
for small or complex images, because thicker frames can
decrease quality by hiding parts of an image.
Overprint Black
overprint Ensures that black text prints cleanly within a tint or picture area. The
text appears in a richer, deeper black, with the underlying CMY
values equal to those of the printed background.
PostScript
overprint Uses the overprint information that exists in the PostScript file. This
option also determines whether the DTP application's PostScript
overprint settings are retained in the RIP.
Resolution Resolution Enables you to set the resolution for the job when printed. Select
either 600 dpi (fine) or 1200 dpi (very fine).
Screening Screening Converts images, graphics and text into information that can be
printed (halftone dots). The human eye “smooths out” this
information, which seems visually consistent with the original picture.
Thus, the more lines per inch, the more natural the image appears.
Screening is achieved by printing dots in numerous shapes or lines
in an evenly spaced pattern. The distance between the screen dots
or lines determines the quality of the image. Printers can work with
constant amounts of toner and still produce a wide range of colors
when you use screening. The darker the color, the larger the dot.
To print an image on a digital printer or press, the Creo server needs
to digitally approximate the grayscale values with different
distributions of pixels. This process is commonly referred to as
halftoning. Digital halftoning begins by sampling the original image at
the same number of dots per inch as the printer and constructing
digital halftone cells.
184 Chapter 11—Job parameters