The print motive can also be converted into a rasterized black and white image with image editing software like Photoshop this is useful, for example, to achieve special halftone effects. Printing of pre-halftoned black&white images
To ensure that the halftone settings of the application program are used by PrintFab, select "Halftone mode" = "Single Black (pre-halftoned)" (or "Multi black (pre-halftoned)" when using multi-black cartridges). For multicolor prints, color separation must be done beforehand with suitable publishing software such as CorelDraw or Adobe Illustrator - see the "Printing color separations" section below. PrintFab only supports printing of monochrome artwork and therefore just offers a single setting for the screen angle. The raster size and angle must be adjusted to suit the screen printing mesh and the inks. Adjustment of screen frequency and screen angleĪs already described, the exposure process is based on a black-and-white process intermediate tones are produced by means of a so-called halftone raster. The amount of ink should be adjusted so that good UV opacity is achieved without ink running on the film. You can select which ink cartridges to use in "Multi-black" mode. This allows even more black ink to be applied and - if necessary - allows to compensate for failed printhead nozzles. The black cartridge can be replaced by a "UV Black" with better opacity for UV light or all color cartridges can be replaced by an "All-black" ink set. In addition, the black coverage can be increased by using special inks. Especially with Epson printers, PrintFab can multiply the amount of ink by making several passes of the print head at a slower paper feed rate. When printing films for screen printing exposure, it is highly important that black ink is printed opaque enough to block the UV light and thus to achieve a good result when the screen is exposed.įor this purpose, PrintFab offers the possibility to significantly increase the amount of applied ink when printing with many Epson and Canon inkjet printers (compared to normal printing on paper). PrintFab as RIP for Silkscreen Films Special requirements for UV exposure with printed films
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