Additive Color Model Varying proportions of red, green, and blue light are interpreted as different colors. It is an additive process because if you add full intensities of red, green, and blue you acheive white. If none of the additive colors are present, you achieve black. Bleed The excess image that allows printing to the edge of the finished page. Without allowing for a bleed, variances in trimming in the finishing stages could leave unprinted portions of the paper showing. Calibration The process of tuning your equipment to produce a more accurate representation of colors usually using a CMS. CMYK Cyan, magenta, yellow, and black are the four inks used in commercial printing. They are part of the Subtractive Color Model. Color Management System (CMS) Software that is built into an application or operating system that helps to interpret between the different gamuts of different devices in the design and production process. ColorSync and Kodak CMS are examples. Color space See gamut ColorSync CMS technology built into the Apple Macintosh operating system that manages color across devices and (since it is not application-specific) across applications. Crossover A crossover is an element that spans across two pages. Since The Growing Edge is perfect bound, spreads are treated like individual pages in that there are bleed trims on all sides including the inside edge. If you do not allow for the inside edge bleed trim, portions of crossover elements are lost. DPI Dots per inch. A measurement of an output device's resolution and quality. All images and ads provided to The Growing Edge should be set to 300 dpi. EPS Encapsulated PostScript. An industry standard file format. One of the two formats accepted by The Growing Edge. Film Separations In a traditional printing process, negative film is made from your layout and colors are separated into cyan, magenta, yellow and black film which are then used to make the plates which are used on the printing press. Gamut The range of color that a specific device can reproduce. Monitors (which display color using the additive color model) usually have a large color gamut, while desktop ink jet printers typically have a much smaller gamut. In the diagram to the right, the bright triangular area represents the gamut of a Trinitron monitor while the entire area represents the total spectrum of visible light. ICC International Color Consortium. Produces industry-standard CMS profiles for devices such as monitors, scanners, and printers. Kodak CMS An application specific CMS developed by Kodak which manages color within applications which are written to take advantage of the software. Offset Printing This process relies on the principle that oil and water do not mix. The image area of the printing plate is raised or etched and treated so that oil-based ink is received onto the plate, but not water. Presses contain separate printing units for each color. A four-color press has units for cyan, magenta, yellow, and black. The paper travels in succession through the separate units to complete the piece. PantoneTM A set of over 1200 standard colors developed by Pantone, Inc. Although typically used as spot colors, most application programs can "translate" these into process colors. This ability (along with a good Pantone Spot-to-Process color swatchbook) is helpful when designating flat areas of color when an accurate CMS system is not in place. Perfect Binding A common type of binding process where pages are gathered and stacked, the inside edge is ground-off, an adhesive applied and a cover is wrapped around the outside of the piece producing a spine. The Growing Edge is bound this way as of Vol. 11, No. 4. Previously, saddle-stitching was used to bind the magazine. Instead of pages being stacked, they are wrapped around one another and staples are applied to the middle. The publication is then folded. PostScript Postscript is a programming language that describes the appearance of a printed page. It was developed by Adobe in 1985 and has become an industry standard for printing and imaging. Postscript describes the text and graphic elements on a page to a black-and-white or color printer or other output device. Note that the average home laser printer and most ink-jet printers are not Postscript printers. Plates Offset printing uses plates which have a light-sensitive coating and are exposed to reversed images (usually from film separation negatives) producing a positive image area. The plate is then put onto a cylinder on an offset press. Process Color A color made up of varying amounts of cyan, magenta, yellow, and black (the four colors used in commercial offset printing and referred to as the Subtractive Color Model) dots that overlap to create the illusion of a large number of different colors. Proof A printed copy of your layout at size on a device which produces accurate color. Proofs for your ad can be done using a number of different methods each with their own differences in quality and cost. Desktop proof: includes on-screen previews or desktop prints such as ink-jet, laser, or dye sublimation. On-screen previews are for your benefit only. For your ad submittal you will need to include in the package at least a desktop proof. Depending on the quality of your printer, your CMS system and it's calibration, and the media used, your proof may not match what appears in the magazine. The proofs listed below are widely accepted by printers and are more accurate at displaying the final product than desktop proofs. Separation proofs: includes overlay proofs and bluelines (geared more toward the traditional film/plate process as opposed to computer-to-plate) as well as laminate proofs. Laminate proofs (Fuji ColorArts, DuPont Cromalin, and 3M Matchprint) uses the four color separations and binds them together to give a representation of the final printed product. Color is more accurate than desktop proofs, but the paper used can alter the color temperatures slightly. RGB Color Model See Additive Color Model. Spot Color Pre-mixed inks (such as Pantone colors) used on a separate plate. Please convert all spot colors in your files to CMYK process colors before submitting your ad. Subtractive Color Model Varying proportions of cyan, magenta, yellow, and black inks are interpreted as different colors. It is an subtractive process because if you subtract full intensities of cyan, magenta, yellow, and black you acheive white. If none of the subtractive colors are present, you achieve white. TIFF Tag Image File Format. Originally developed in 1986 by a board chaired by Aldus Corp. (now part of Adobe) and contributed to by Hewlett-Packard and Microsoft. It is one of the most common file formats for exchanging image data and is the preferred format of The Growing Edge.