You’ll add red press ink to the red screen and yellow press ink to the yellow screen. You will want a film for red and a film for yellow to create a screen for red and a screen for yellow. Imagine you have a design utilizing the spot colors red and yellow. You wouldn’t want elements that are colored red and yellow, for example, on a single film when creating spot color seps. Proper spot color separations result in each spot color in a design to print to an individual film. This article discusses color separations intended for film output. Screen printers output their separations to films using a RIP software through an inkjet printer. The top two utilized are “spot color” and “simulated process”. Whatever process you choose, make sure your decision is informed about what will work best for the design, the t-shirt, and your press.After a graphics art file is complete and approved the file may need preparation so that the printing of the film positive separations yield the proper results for direct screen printing, or at a minimum a review.Ĭolor separating for screen printing has a few categories. Doing this creates a rosette pattern that allows the ink to mix and create a wide spectrum of color. CMYK separations print with eliptical halftones and each screen angle is separated by 30 degrees. Although CMYK process prints can be reproduced on dark garments using a white underlay, the simulated process technique on darks will achieve a brighter, more consistent print. For this reason CMYK separations are generally printed only on white garments. Unlike the other separation techniques that use opaque inks, CMYK process inks are light and transparent. When screen-printing with process inks, some colors – like bright red, purple, and green – are difficult to reproduce and may be generated by additional screens in order to create a vivid print. This technique is commonly used in offset printing. Since the halftone pattern is a bitmap, no Raster Image Processing (RIP) software is needed to output films.ĬMYK process separation mixes 4 main colors (Cyan, Magenta, Yellow, Black) to produce a full-color image.An index separation eliminates many press variables that can arise with other types of separations. Shirt color does not affect index separations the way it can with elliptical dots. Prints look consistent printed on any color substrate: lights, darks, and bright colors.Since the square dots sit side by side like a grid or puzzle, there’s no heavy ink build up. No moiré! The stochastic bitmap dots burn to mesh easily without the chance of a moiré. ![]() Although an index separation isn’t right for every design, it does have many advantages for printers: The square dots sit side by side with no overlap. The end result is a bitmapped-looking image with each square pixel representing a different color in the limited color palette. Index separation is a separation method that converts images using stochastic square dots of equal size instead of elliptical halftones. This separation approach works for just about every design on any color t-shirt. This process uses elliptical halftones that layer on top of each other at the same print angles. Simulated process separation is the most commonly used type of separation for printing photorealistic images and t-shirt designs that contain millions of colors. Spot color separation is the most basic idea of color separation where each different block of color is on its own plate/screen. Spot colors are used for printing text, solid lines, and area images, but not full color photos or designs with complex gradients. Spot color separation refers to separate solid colors that are not mixing. Each technique has different behaviors on press: The complexity of the separation process can range from spot color separations for simple designs to simulated process color separations for high-end, photographic designs. ![]() Each is based on the style of graphic being printed along with other variables, such as the number of colors and what color substrate the graphic will be printed on. There are several types of color separations. The screen print separation process is a crucial element in the development of a great print. ![]() Color separation is the process of converting an image, design, or photograph into a set of colors that can be burned on screens and printed.
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