Matters needing attention when using spot colors before printing

Dec. 13, 2022

       Many customers have certain questions about the use of spot colors in packaging boxes. Now RX packaging will give you detailed answers, so that you can clearly know whether to use spot colors when placing an order.

packaging boxes

       1. Unification of spot color color names.

       In different software, the names of the same two registers may be different. For example, FreeHand named PANIONEI IF5 as PANTIONE 1F5CVC. In this way, when the FreeHand graphics object is placed into PageMaker for typesetting, the same color will have three names, and three printing plates will be produced during color separation output, resulting in output errors.

       Therefore, if the data file needs to be used in two or more softwares, before the integrated color separation output, you must pay attention to: the name of the same spot color must be unified. The more commonly used method is to follow the color name in the layout software, and rename the name of the same spot color to a unified name in the palette of various software.

       2. The angle of spot color screening.

       Under normal circumstances, spot colors are printed on the spot, and dot processing is rarely done, so the angle of spot color screening is rarely mentioned. But when using the light screen color of the color registration, there will be problems in the design and modification of the screen angle of the spot color dots. If the spot color with dots has an overprint area following the colors printed by other dots, the angle of the spot color screening must be considered.

       At this time, if the angle formed by the screening angle of the spot color dots and the screening angles of other colors is less than 30 degrees, there will be moirĂ© due to collision with the screen; if the angles overlap with each other, it will cause the problem of ink overprinting, which will cause printing problems. Severe distortion of colors.

       In addition, the spot color screen angle is generally preset to 45 degrees in the software (45 degrees are considered to be the most comfortable angle for human eyes, so that the screen dots can be arranged in a direction at an equal angle to the horizontal and vertical lines to reduce the The ability of the human eye to detect dots,) if a two-tone image or data file has four-color black and white printing (generally in four-color screen printing, put the black dot at 45 degrees, yellow at 0 degrees, Magenta is 15 degrees, cyan is 75 degrees,) and there are spot colors, or if there are more than two spot colors, they will be output at 45 degrees during color separation and screening, so when using light screen for spot colors, if If it is possible to overprint with other screening colors, it is necessary to open the dialog box of software color setting or print setting during color separation output to modify the screening angle of the spot color.