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that best relates:
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Linked Images
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All images used in job should
be included with the job when
submitted for output, even if
the images are embedded in the
document. The images also need
to meet the following
specifications:
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Image Resolution for Offset
Printing: |
The resolution of an image needs
to be twice the value of the
line screen at which it will be
printed and at the size in will
be printed. For example, if you
have a 3" x 5" photo that will
be printed at 100%, and your
piece will be printed at 150
lines per inch (lpi), then the
resolution of your image at 3" x
5" should be 300 dots per inch
(dpi). Likewise, if you want to
print the same piece at 6" x
10", then you would either need
to scan the image at 600 dpi at
100% or 300 dpi at 200% to get a
6" x 10" at 300 dpi. |
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Image Resolution for Large
Format Inkjet Printing: |
The resolution of an image
depends largely on the intended
use of the graphic. If the
graphic will only be viewed from
several feet or yards away, the
resolutions can be as low as 20
to 30 dpi at the output size. If
the graphic will be viewed up
close and photo quality is
desired, then the resolution
should be as high as possible,
300 to 600 dpi. |
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Image Formats: |
First, ALL color images that are
to be output, either for offset
or inkjet printing, must be CMYK
(Cyan, Magenta, Yellow, Black),
not RGB (Red, Green, Blue). The
RGB color spectrum is much
broader than the CMYK spectrum.
When the color space is
converted from RGB to CMYK some
color will be lost - primarily
the deep reds, greens, and
blues. In addition to the loss
of color, no two output devices
will convert the colors exactly
the same which means the color
will not be consistent from
proof to press or from one
printing company to another. You
should convert any RGB images
you have to CMYK in Photoshop,
so that you can see the color
shift and correct it before
submitting the job.
We
have also found that it is best
to use the Adobe 1998 profile
for RGB images and the US Web
Coated Offset ver. 2 profile for
CMYK. Before converting an
RGB image to CMYK make sure you
have first converted the image
to Adobe 1998 RGB and then
convert to CMYK with the US Web
Coated 2 profile.
It is best to save all images as
tiff''s unless they contain
clipping paths or are duotones.
Today TIFF is the native format
for most rips, therefore, using
tiffs helps jobs process faster
because the rip doesn't have to
convert the format.
If you have image files in any
other format they should be
converted to either EPS or TIFF.
CMYK JPEGs are usable, but be
aware that every time they are
opened and resaved there is some
image degradation that occurs. |
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