Top best answers to the question «What image mode do professional offset printers usually use»
The reason offset printers use CMYK is that, in order to achieve color, each ink (cyan, magenta, yellow, and black) has to be applied separately, until they combine to form a full-color spectrum. By contrast, computer monitors create color using light, not ink.
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Offset printing is a common printing technique in which the inked image is transferred (or "offset") from a plate to a rubber blanket and then to the printing surface. When used in combination with the lithographic process, which is based on the repulsion of oil and water, the offset technique employs a flat (planographic) image carrier.Ink rollers transfer ink to the image areas of the image ...
Offset printing is a commonly used printing technique where an inked image is transferred (or “offset”) from a plate to a rubber blanket, then to paper. The offset process is a lithographic process. Lithoghraphy is a process based on the repulsion of oil and water. An image that is offset printed is separated into its fundamental colors.
Work in RGB mode until you finish editing your image. Then convert the image to CMYK mode and make any additional color and tonal adjustments. Especially check the highlights and shadows of the image. Use Levels, Curves, or Hue/Saturation adjustment layers to make corrections. These adjustments should be very minor. Flatten the file if necessary, then send the CMYK file to the professional printer. Place your RGB or CMYK image in Adobe InDesign or Adobe Illustrator.
Monitors typically use RGB color (additive model — adding to make white), but offset printing uses CMYK pigments (subtractive color — subtracting from the existing white). Printed images have less visual range, saturation, and contrast than digital images, so in print, colors will usually appear darker and less vibrant.
Because all printers use CMYK colours to put the image on paper, from inexpensive home inkjets to professional laser/digital types to industrial offset presses. Sending a document with RGB colour definitions to print can result in a number of problems, from unwanted colour shifts to slower print processing to outright print failure.
Scanners, digital cameras and computer monitors use red, green and blue (RGB) light to display color. Commercial printing presses print with cyan, magenta, yellow and black (CMYK) ink, called process printing, instead of RGB light, and therefore produce a different range of color. See 4 color process printing explained for more info.
With offset or “litho” printing the image (your artwork) is transferred to metal plates and then from the plates to a rubber blanket. Then the inked blankets transfer the image onto paper. The process is called offset because the ink is first transferred from plate to blanket rather than going directly on to the paper.
PNG can be good but they are in RGB color mode; this is not desirable if you print on offset or anything that requires CMYK color mode. You could use it but either the printer will refuse your files and ask you to convert them yourself to CMYK color mode OR the printer will convert it for you and you'll have no control on the final result.