About Printing; Printing Images - Adobe 13101332 - Photoshop - Mac User Manual

Adobe Photoshop Help
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Printing (Photoshop)

About printing

Whether you are providing an image to an outside service bureau or just sending a quick
proof to a desktop printer, knowing a few basics about printing will make the print job go
more smoothly and help ensure that the finished image appears as intended.
Types of printing When you print a file, the Adobe Photoshop application sends your
image to a printing device, either to be printed directly onto paper or to be converted to a
positive or negative image on film. In the latter case, the film can be used to create a
master plate for printing by a mechanical press.
Types of images The simplest types of images, such as line art, use only one color in one
level of gray. A more complex image, such as a photograph, has color tones that vary
within the image. This type of image is known as a continuous-tone image.
Halftoning To create the illusion of continuous tones when printed, images are broken
down into a series of dots. This process is called halftoning. Varying the sizes of the dots in
a halftone screen creates the optical illusion of variations of gray or continuous color in the
image.
Color separation Artwork that will be commercially reproduced and that contains more
than a single color must be printed on separate master plates, one for each color. This
process is called color separation and most commonly uses cyan, yellow, magenta, and
black (CMYK) inks. In Photoshop, you can adjust how the various plates are generated and
create traps.
Quality of detail The detail in a printed image results from a combination of resolution
and screen frequency. The higher an output device's resolution, the finer (higher) a screen
ruling you can use.

Printing images

Photoshop provides the following printing commands:
Page Setup and Print display options that are determined by your printer, print drivers,
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and operating system.
Print with Preview displays Photoshop's printing, output, and color management
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options.
Print One Copy prints one copy of a file without displaying a dialog box.
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Note: You cannot print images directly from ImageReady. If you have an image open in
ImageReady and need to print it, use the Jump To command to open the image in
Photoshop. Keep in mind that ImageReady images open at screen resolution (72 ppi);
this resolution may not be high enough to produce a high-quality print.
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