ChannelExtender: separate from RGB to ECG

Expanded Color Gamut (ECG) printing, also referred to as Fixed Color Palette printing, uses a standardized ink set enhancing the color space to reproduce any color used in the design. In the plugin, up to three additional inks can be used (Red, Orange, Green and/or Blue or Violet).
This method allows for a virtually unlimited number of colors in the design and also for nesting print jobs with different color channels, without changing the ink configuration of the printing machine. 

How to separate from RGB to ECG

You will need a GMG OpenColor project with precalculated and published ChannelExtender separation profiles. Make sure the Input Color Space of the separation profile matches the document color space (not the working space).

1. Open an RGB image in Adobe Photoshop.
2. Click ChannelExtender in the plugin panel.
3. Select the GMG OpenColor project defining the target color space. A list with Output Inks available in the project will be shown. If no channels are shown or channels are missing, please check that the Source Color Space is matching and that the required profile variants have been calculated.
4. Select the additional inks you want to use. (You cannot deselect CMYK.)
5. Set the Color Boost level, which controls the saturation of the image.
6. The Work Preview functionality allows editing of the original document in RGB while providing a color accuratesimulation of the print result. The Work Preview automatically uses the correct GMG OpenColor profile for the Adobe Photoshop Proof Colors functionality.
   (The first time you are using a ChannelExtender profile, Adobe Photoshop needs to initialize internal parameters. As a side effect, the Assign Profile dialog will be shown. Just ignore it and click OK or Cancel. The settings in the dialog box will be ignored.)
   
   
   The example shows an ISO Coated target color space extended by Orange, Green, and Blue inks. On the left, you can see the original RGB image. On the right, the color-boosted 7c image.