WHAT IS THE SPOT COLOR

WHAT IS THE SPOT COLOR

 In offset printing, a spot color or solid color is any color generated by an ink (pure or mixed) that is printed

using a single run, whereas a process color is produced by printing a series of dots of different colors.

The widespread offset-printing process is composed of the four spot colors cyan, magenta, yellow, and key (black) commonly referred to as CMYK. More advanced processes involve the use of six spot colors (hex achromatic process), which add orange and green to the process (termed CMYKOG). The two additional spot colors are added to compensate for the ineffective reproduction of faint tints using CMYK colors only. However, offset technicians around the world use the term spot color to mean any color generated by a non-standard offset ink; such as metallic, fluorescent, or custom hand-mixed inks.

When making a multi-color print with a spot color process, every spot color needs its own lithographic film. All the areas of the same spot color are printed using the same film, hence, using the same lithographic plate. The dot gain, hence the screen angle and line frequency, of a spot color varies according to its intended purpose. Spot lamination and UV coatings are sometimes referred to as 'spot colors', as they share the characteristics of requiring a separate lithographic film and print run.

COMPUTER METHODS

There are various methods to incorporate rather sophisticated patterns of spot colors in the final prepress artwork. Software applications such as Adobe InDesign, Adobe Illustrator, CorelDRAW, QuarkXPress, and Scribus may generate spot colors as additional channels. Adobe Photoshop can also be used to generate soft edges (widely known as feathered edges) of spot colors. The dissolve effect provided by Adobe Photoshop layer patterns can be generated for any spot color.

OPTIMIZING USAGE

Generally, the cost and potential for problems for a print job increase as one adds more spot colors, due to the increased cost and complexity of added process inks and films, and requiring more runs per finished print. However, because of the complicated process, spot colors are effective at preventing forgeries of money, passports, bonds, and other important documents. Money printing, for example, uses secret formulae of spot colors, some of which can be seen by the naked eye and some that can only be seen by using special lights or applying certain chemicals.

CLASSIFICATION

Spot color classification has led to thousands of discrete colors being given unique names or numbers. There are several industry standards in the classification of spot color systems, such as:

• Pantone, the dominant spot color printing system in the United States and Europe.
• Toyo is a common spot color system in Japan.
• DIC Color System Guide, another spot color system common in Japan – it is based on Munsell color theory.
• ANPA is a palette of 300 colors specified by the American Newspaper Publishers Association for spot color usage in newspapers.
• GCMI is a standard for the color used in package printing developed by the Glass Packaging Institute (formerly known as the Glass Container Manufacturers Institute, hence the abbreviation).
• HKS is a color system that contains 120 spot colors and 3,250 tones for coated and uncoated paper. HKS is an abbreviation of three German color manufacturers: Hostmann-Steinberg Druckfarben, Kast + Ehinger Druckfarben, and H. Schmincke & Co.
• RAL is a color-matching system used in Europe. The so-called RAL CLASSIC system is mainly used for varnish and powder coating.

Because each color system creates its own colors from scratch, spot colors from one system may be impossible to find within the library of another.

EXTERNAL LINKS

•      Spot and Process Colors Explained
•      Creating color swatches or samples to match spot colors

REFERENCES

1.  What is the difference between spot and process colors?

2.  The Informed Illustrator: Digital Spot Color Systems

 

SPOT COLOR
Color science	Color Physics	The electromagnetic spectrum, Light Rainbow, Visible, Spectral colors, Chromophore, Structural coloration, Animal coloration, Color of chemicals, Water, Spectral power distribution, Colorimetry
	Color perception	Metamerism, Color blindness, Achromatopsia, Dichromacy, Evolution of color vision, Color vision test, Tetrachromacy, Opponent process, Afterimage, Unique hues, Impossible colors, Chromesthesia, Sonochromatism, Color task, Color code, Color constancy, Color temperature, The dress
	Color psychology	Color symbolism, Color preferences, Lüscher color test, Kruithof curve, Political color, National colors, Chromophobia, Chromotherapy
	Color reduction	Color photography, Color balance, Color cast, Digital image processing, Color management, Color printing, Multi-primary color display, Quattron, Color model, additive, RGB, subtractive, CMYK, Color space, Color mapping
Color Philosophy	Color scheme	Color tools, Monochromatic colors, Complementary colors, Analogous colors, Achromatic colors (Neutral), Polychromatic colors, Light-on-dark, Web colors, Tinctures in heraldry
	Color theory	Color mixing, Primary color, Secondary color, Tertiary color, Chromaticity, Color solid, Color wheel, Color triangle, Color analysis (art), Color realism (art style), On Vision and Colours (Schopenhauer), Theory of Colours (Goethe)
Color terms	Basic terms	Blue, Green, Red, Yellow, Pink, Purple, Orange, Black, Gray, White, Brown
	Cultural difference	Linguistic relativity and the color naming debate, Blue-green distinction in language, Color history, Blue in culture, Color in Chinese culture, Traditional colors of Japan, Human skin color
	Color dimensions	Hue, Dichromatism, Colorfulness, Pastel colors, Luminance, Lightness, Darkness, Brightness, Iridescence, Fluorescence, Grayscale, Tint, shade, and tone
Color organizations	Pantone, Color Marketing Group, Color Association of the United States, International Colour Authority, International Commission on Illumination (CIE), International Color Consortium, International Colour, Association
Lists	List of colors: A-F, List of colors: G-M, List of colors: N-Z, List of colors (compact), List of colors by shade, List of color palettes, List of color spaces, List of Crayola crayon colors, history, Color chart, List of RAL, colors, List of web colors
Shades of	Red, Orange, Yellow, Green, Cyan, Blue, Violet, Purple, Magenta, Pink, Brown, White, Gray, Black
Related	Vision, Qualia, Lighting