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is cmyk for print?

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Answer # 1 #

The best way to define colors is to use numbers associated with various pigments. Numbers don’t lie to us because the number values don’t change. Instead of recognizing red, green and blue (RGB) values often used on desktops, high-end digital printers use a CMYK color wheel consisting of cyan, magenta, yellow and key (black). In both processes, colors combine to print dark colors that may appear as black ink.

These variances make a big difference and result in different secondary and tertiary colors. To recap:

RGB is a three-color process that stands for red, green and blue, and is most commonly viewed on desktop computer screens.

CMYK is a four-color process and stands for cyan, magenta, yellow and key (black), and is preferred for use on printed materials because it helps achieve a true color.

Here, we’ll take a closer look at why printers don’t all print the same and what you can do to get the best color output possible.

First, let’s consider that in a typical desktop program like Microsoft Word, the specific colors you choose are represented by the RGB system which is intended for viewing on a computer monitor, not the printed page or products. Now imagine you invented a product that contains both plastic and metal components, and both materials need to be bright red. You found a manufacturer who can build your product, however, you want both the plastic and metal to be the same, exact red color you specify.

With so many shades of red available, how are you going to do it? The good news is that you can specify the color of your product based on the CIE Chromaticity Diagram, also known as the LAB color space. In this diagram, all colors in the same location in this color space look the same to a standard observer.

The LAB color space is the Universal Translator for different devices and is more accurate than both RGB and CMYK.  If you use LAB colors in your software program, such as Photoshop, the colors may convert to CMYK or RGB when printed. Because your desktop program might use different starting values than your printer (RGB versus CMYK), the colors you expect to see on your printed document often disappoint.

If you print to an inexpensive desk jet printer from a big box store and I print the same document on a printer that costs thousands of dollars, you’d certainly hope to notice a marked difference in print quality and expect the higher-end printer to perform better.

And it would. That’s because most printers intended for higher-output business or commercial print jobs have the right translators to take the device information from the input source to the output source. Without the right color translation, however, even the most capable high-end printer will have problems.

Production print specialists often use printers and printing presses that might exceed $100,000 in cost. These specialized printers use a Color Management Module (CMM), a software that does the calculations to convert files from one color model (RGB) to another (CMYK).

Examples of CMMs include Adobe ACE, Heidelberg CMM, Kodak CMM, Agfa CMM, and others. On a $100 desk jet printer, you have very little control over what the CMM is doing, but on the high-end printer, there is quite a bit of CMM control of input and output color space profiles.

Taking a step back, consider what color space you work in when designing your document. You’ll likely work in the RGB color space. We can, on higher-end printing systems, set the raster image processor (RIP) for the color space profile based on your input source. That means we can set the RIP for RGB, but when your file is processed, it can keep the original color intent and translate it into the correct CMYK output profile.

Because of this, you will likely see a significant color difference between the desktop printer and the high-end printer. Once you tweak your formula to get exactly the results you need on the better printer and lock in your settings, you’ll get the color you want each and every time.

You may need to make some tweaks to get the print results you want. For example, calibrate your monitor to the printer, which may require some assistance. It’s important to have realistic expectations from the onset and understand how the world of digital printing works as it relates to color management and color translations between different color spaces. Having a consistent color management system in place, whether it be big or small, will help you see the results you desire when printing in color.

It is possible to choose CMYK or RGB for print projects. If you know in advance that your document is intended for a high-quality print job — say, brochures or flyers — explore the settings in the computer program you’re using to see whether you can change the RGB default color mode to CMYK prior to designing it.

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Rockets Crawford
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Answer # 2 #

CMYK stands for Cyan, Magenta, Yellow, and Black. These four primary ink colors are combined in varying amounts to create a wide variety of colors for printing. You should always request a CMYK copy of your logo or any other file that you would like to have printed from your graphic designer.

The above Blissful Bicycle logo and marketing materials look as though they were printed with blue ink but in actuality, the blue color is made up of 55% Cyan ink and 22% Magenta ink. When the two color values are combined for printing, the above blue is the result.

RGB stands for Red, Green, and Blue. These colors are lights that are mixed to create and display digital images on screens and electronic devices. Images created using RGB color mode can display very vibrantly, but those bright neon colors are not able to be reproduced using CMYK inks.

When you try to print files that are intended to be viewed digitally on a screen, the print color outcome will be much different than what appears on your screen. Here is an example of what an RGB file looks like on screen in comparison to how it looks when you convert RGB to CMYK for printing.

If your file is going to be printed, it needs to be set up in CMYK color mode. How can you make sure your file is set up in CMYK?

Below are the steps to check your print files using popular Adobe design software.

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Try phiajj
FINISHER HAND
Answer # 3 #

CMYK is a four-color process and stands for cyan, magenta, yellow and key (black), and is preferred for use on printed materials because it helps achieve a true color.

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Prasantkumarwat xixelx
COMMANDING OFFICER HOMICIDE SQUAD
Answer # 4 #

The CMYK color model (also known as process color, or four color) is a subtractive color model, based on the CMY color model, used in color printing, and is also used to describe the printing process itself. The abbreviation CMYK refers to the four ink plates used: cyan, magenta, yellow, and key (black).

The CMYK model works by partially or entirely masking colors on a lighter, usually white, background. The ink reduces the light that would otherwise be reflected. Such a model is called subtractive because inks "subtract" the colors red, green and blue from white light. White light minus red leaves cyan, white light minus green leaves magenta, and white light minus blue leaves yellow.

In additive color models, such as RGB, white is the "additive" combination of all primary colored lights, black is the absence of light. In the CMYK model, it is the opposite: white is the natural color of the paper or other background, black results from a full combination of colored inks. To save cost on ink, and to produce deeper black tones, unsaturated and dark colors are produced by using black ink instead of the combination of cyan, magenta, and yellow.

With CMYK printing, halftoning (also called screening) allows for less than full saturation of the primary colors; tiny dots of each primary color are printed in a pattern small enough that humans perceive a solid color. Magenta printed with a 20% halftone, for example, produces a pink color, because the eye perceives the tiny magenta dots on the large white paper as lighter and less saturated than the color of pure magenta ink. Halftoning allows for a continuous variability of each color, which enables continuous color mixing of the primaries. Without halftoning, each primary would be binary, i.e. on/off, which only allows for the reproduction of seven colors: the three primaries, three secondaries and gray/black.

The CMYK color model is based on the CMY color model, which omits the black ink. However, the imperfect black generated by mixing commercially practical cyan, magenta, and yellow inks is unsatisfactory, so four-color printing uses black ink in addition to the subtractive primaries. Common reasons for using black ink include:

A black made with just CMY inks is sometimes called a composite black.

When a very dark area is wanted, a colored or gray CMY "bedding" is applied first, then a full black layer is applied on top, making a rich, deep black; this is called rich black.

The amount of black to use to replace amounts of the other inks is variable, and the choice depends on the technology, paper and ink in use. Processes called under color removal, under color addition, and gray component replacement are used to decide on the final mix; different CMYK recipes will be used depending on the printing task.

CMYK or process color printing is contrasted with spot color printing, in which specific colored inks are used to generate the colors appearing on paper. Some printing presses are capable of printing with both four-color process inks and additional spot color inks at the same time. High-quality printed materials, such as marketing brochures and books, often include photographs requiring process-color printing, other graphic effects requiring spot colors (such as metallic inks), and finishes such as varnish, which enhances the glossy appearance of the printed piece.

CMYK are the process printers which often have a relatively small color gamut. Processes such as Pantone's proprietary six-color (CMYKOG) Hexachrome considerably expand the gamut. Light, saturated colors often cannot be created with CMYK, and light colors in general may make visible the halftone pattern. Using a CcMmYK process, with the addition of light cyan and magenta inks to CMYK, can solve these problems, and such a process is used by many inkjet printers, including desktop models.

Comparisons between RGB displays and CMYK prints can be difficult, since the color reproduction technologies and properties are very different. A computer monitor mixes shades of red, green, and blue light to create color pictures. A CMYK printer instead uses light-absorbing cyan, magenta, and yellow inks, whose colors are mixed using dithering, halftoning, or some other optical technique.

Similar to monitors, the inks used in printing produce a color gamut that is "only a subset of the visible spectrum" although both color modes have their own specific ranges. As a result of this, items which are displayed on a computer monitor may not completely match the look of items which are printed if opposite color modes are being combined in both mediums. When designing items to be printed, designers view the colors which they are choosing on an RGB color mode (their computer screen), and it is often difficult to visualize the way in which the color will turn out post-printing because of this.

To reproduce color, the CMYK color model codes for absorbing light rather than emitting it (as is assumed by RGB). The "K" component absorbs all wavelengths and is therefore achromatic. The cyan, magenta, and yellow components are used for color reproduction and they may be viewed as the inverse of RGB. Cyan absorbs red, magenta absorbs green, and yellow absorbs blue (-R,-G,-B).

Since RGB and CMYK spaces are both device-dependent spaces, there is no simple or general conversion formula that converts between them. Conversions are generally done through color management systems, using color profiles that describe the spaces being converted. An ICC profile defines the bidirectional conversion between a neutral "profile connection" color space (CIE XYZ or Lab) and a colorspace we are interested in, in this case both RGB and CMYK. The precision of the conversion depends on the profile itself, the exact methodology, and because the gamuts do not generally match, the rendering intent and constraints such as ink limit.

ICC profiles, internally built out of lookup tables and other transformation functions, are capable of handling many effects of ink blending. One example is the dot gain, which show up as non-linear components in the color-to-density mapping. More complex interactions such as Neugebauer blending can be modelled in higher-dimension lookup tables.

The problem of computing a colorimetric estimate of the color that results from printing various combinations of ink has been addressed by many scientists. A general method that has emerged for the case of halftone printing is to treat each tiny overlap of color dots as one of 8 (combinations of CMY) or of 16 (combinations of CMYK) colors, which in this context are known as Neugebauer primaries. The resultant color would be an area-weighted colorimetric combination of these primary colors, except that the Yule–Nielsen effect of scattered light between and within the areas complicates the physics and the analysis; empirical formulas for such analysis have been developed, in terms of detailed dye combination absorption spectra and empirical parameters.

Standardization of printing practices allow for some profiles to be predefined. One of them is the US Specifications for Web Offset Publications, which has its ICC color profile built into some software including Microsoft Office (as Agfa RSWOP.icm).

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Sripriya Sirrinn
THERMOSTAT REPAIRER
Answer # 5 #

If you’ve ever had a project commercially printed, you’ve most likely heard the term “CMYK”.  But what does CMYK mean and why is it important?

Let’s discuss the definition of CMYK, how this color process works in commercial printing and why it is the dominant color model.

CMYK is an acronym for Cyan, Magenta, Yellow and Black.  CMYK refers to the 4 primary colors of pigment used in 4 Color Process Printing.   The CMYK color model also describes the full color printing process itself.  In full color printing, every image is color separated into Cyan, Magenta, Yellow and Black in specific dot patterns that vary in size and frequency to create a combination of ay color with a fraction of the ink.

CMYK is a subtractive color spectrum.  This means that these inks mask colors on a lighter background (like white paper).  The CMYK ink subtracts the red, green and blue from white light and leaves the Cyan, Magenta, and Yellow.  Black is the absence of color.

The CMYK color model works by partially or entirely masking colors on the lighter surface (paper or substrate).  The ink reduces the light that would otherwise be reflected.

The RGB color model works the opposite.  RGB is an additive color spectrum.  When RGB colors overlap, the results are subtractive colors (cyan, magenta, yellow) RGB color model uses transmitted light.  Additive color models use light to display color, while subtractive (CMYK) color models use reflected light.

RGB color space is primarily used on digital displays (computers, tablets, TVs, etc) and uses the light from the device to display the color.  The colors result from transmitted light.  When all spectrums from the RGB color space overlap, the result is white.

CMYK color space is primarily used for printed material and uses ink to display color.  The colors result from reflected light.  When all spectrums from the CMYK color space overlap, the result is black.

RGB Colors may look great on screen, but they will need to be converted to CMYK color space before supplying your art files to your printer.  Learn more about converting your art from RGB to CMYK here>>>>

A halftone is simply a group of large and small dots that when viewed at a distance, have the appearance of continuous shades of gray or color in an image.

Halftone printing is a reprographic technique of breaking up an image into a series of dots in order to reproduce the full tone and color range of a photograph or monotone art work.  This process simulates continuous tone imagery through the use of dots, varying in size and spacing.  This process also uses various line screens and frequencies to create various densities and a wide range of reproducible colors.  This line screen is also referred to as LPI (lines per inch).  The line screen is the frequency that will control the depth of the colors, the amount of dots.  For example, photorealistic images have an optimal line screen of 65, while simple color images would have an optimal line screen of 35.  LPI (lines per inch) is NOT the same as DPI (dots per inch), which is another common printing term you’ve most likely heard as well.  Learn more about DPI and Image Resolution here>>>

The other factor involved in printing halftone images is what angle to output the dot pattern at.  The angle is very important in order for the image to look correct.  For example, if you have the incorrect angle and line screen combination, you will get a “Moiré” effect which makes the dot pattern appear like a checkerboard pattern and not a smooth image.  Learn more about Halftones , LPI and screen angles here>>>

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Benny Snodgrass
Model Comedian