Epson Stylus Pro WT7900

The Epson Stylus Pro WT7900, developed by Seiko Epson Corporation, has been designed specifically for proofing flexographic and gravure print jobs that require the color white. The Epson UltraChrome™ HDR White Ink is based on a breakthrough clear organic resin technology, which forces light to scatter randomly, producing a very pure white with high density. Furthermore, the white ink has optimum capabilities to mix it with colored inks to produce tinted white tones and pastels.

In comparison to alternative methods, proofing for flexography applications with the Epson Stylus Pro WT7900 is really easy and does not require expert skills.

As the Epson Stylus Pro WT7900 is based on the same technology and inks as Epson Stylus Pro 7900, 9900, the technical capabilities of the white ink printer are comparable with Epson Stylus Pro 7900, 9900.

If not mentioned otherwise, the Epson Stylus Pro WT7900 uses the same color management technology and supports the same features as the Epson Stylus Pro 7900, 9900 series. For further information, see also Comparison of Printer Drivers for Epson Stylus Pro x900 Printers. Note that printer calibration files and proof profiles for use with the Epson Stylus Pro 7900, 9900 are not compatible with Epson Stylus Pro WT7900.

  • As the Epson Stylus Pro 7900, 9900 series, this high-quality printer made by Epson prints a very large color space by using Epson UltraChrome HDR Ink with additional Orange and Green inks. Furthermore, this revolutionary inkjet printer can print water-based White ink, which is ideal for flexo packaging business applications.
  • The Light Gray and Light Light Gray inks used by the Epson Stylus Pro 7900, 9900 are replaced with White ink and cleaning liquid. The printing qualities of both printer series are comparable and are both excellent. Due to the light gray inks, gradations in the highlights might appear a little bit smoother when printing on the Epson Stylus Pro 7900, 9900.
  • Epson Stylus Pro WT7900 can print 9 colors (9c) in total: Cyan, Light Cyan, Magenta, Light Magenta, Yellow, Photo Black, Orange, Green, White.
  • With the Epson Stylus Pro WT7900, it is possible to print images with a white undercoat. This is useful, for example, to increase the opacity of images when printing on a transparent foil such as GMG ProofFilm transparent 139 or Epson ClearProof™.
  • When printing white undercoat on transparent media, the color space is slightly smaller in the highlights in comparison to printing on GMG ProofMedia, because the luminance of the Epson UltraChrome™ HDR White Ink is slightly lower than the white point of GMG ProofMedia.
  • When selecting the print mode Reverse Print, the print job is mirrored and the white ink is printed on top of the other inks. This results in the impression that the image is printed "behind" the foil.
  • Epson Driver print modes for custom calibrations and profiles: GMG ColorProof also supports custom printer calibrations based on Epson Driver print modes. You can use the GMG starter kit to easily create your own printer calibration and proof profile for support of custom print media.
  • The Epson Stylus Pro WT7900 can optionally be equipped with an integrated measuring device (embedded SpectroProofer). Together with GMG AutoCali Wizard, printer calibration becomes very easy and fully automated.
  • Control strips can be printed together with the proof and are automatically verified by GMG ProofControl.

Special inks (white, metallic, and clear inks as supported by the printer) are handled as spot colors in GMG ColorProof (unless you are using an MX profile with white ink information which allows you to map the image white channel to the profile white channel). You can fine-tune the behavior of the spot color channel by adjusting the Area Coverage or by using a spot color gradation (sfg) file. You can also control the color composition by defining the tonal value and opacity of each ink, for example defining the amount of metallic ink used in a spot color.

See also:

  • For using GMG ProofMedia, select the correct media type, for example GMG ProofPaper semimatte 250, in GMG ColorProof and select Epson Proofing Paper White Semimatte in the printer panel.
  • GMG calibration sets support only white backing. Please make sure that you use SpectroProofer with white backing plates.
  • The nozzle status is checked by a built-in sensor and does not require printing. The check is performed fully automatically, without user intervention required (Output > Maintenance > Automatic Nozzle Clean).
  • Print heads are filled with a cleaning liquid when the printer is switched off. This is required to avoid clogging due to the higher viscosity of the white ink.
  • The white ink cartridge must be shaken once a week to prevent sedimentation of the pigments. To ensure a fail-proof production and long print head life, GMG ColorProof will automatically remind you to agitate the white ink cartridge in regular intervals: A warning sign will be shown in the info pane in the Output view seven days after setting up the printer in GMG ColorProof. You can click on the warning sign to bring up a message box telling you to shake the white ink cartridge. By clicking OK, you confirm that you have manually shaken the cartridge.