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Colour Picker Panel This section is used to change the colour of the ink channel as it is displayed in the Serendipity Client interface. Altering the ink colour to one closer resembling the custom ink in the printer aids in identifying the ink when measuring patches for the paper profile; when linearising; or when examining ink channels in the SoftProof window. Select from Lab, CMYK, or RGB colourspaces. Use the sliders (or type in the number fields) to define the ink colour. Double-­‐click in the colour swatch to select a colour from a Special Colour Set. RGB has the option of using the “Pick from Screen” button, allowing the user to click a colour anywhere on the display to define the ink colour. RGB Pick From Screen Paper Profile Example Note: Device Spot Colours and Spot Colour Mapping Some printers (or custom ink sets) feature inks, such as metallic and white, intended for signage and display; to replicate a press process or substrate; to act as a primer; or for printing on transparent media. These device spot inks are handled outside the normal colour management process and are not included in the output ICC colourspace for printing. These colours are printed in one of two ways: 1. Automatically, according to the Spot Generation method assigned to them in the dropdown menu; or 2. As a spot colour mapped to a plate in an incoming job (see Media – Spotcolour Mapping). Mapped plates will always override the automatic spot generation method when printing. i.e., a job with a spot colour configured in Media to be remapped as “white” will only print white in the areas defined by the spot plate. N-­‐colour mode allows any ink in the printer to be assigned and printed as a Device Spot Colour. Ink Limits The Ink Limits tab has controls for limiting the ink mix of the channels applied in the Paper Profile. The number of ink channels varies depending on whether the printer has light inks and whether they are being treated as separate or combined channels. The window to the right displays a summary of the driver configuration from the selected Media. Options • Yule Nielsen Number – Set the YN number for the paper being profiled (if known). The default is 2. • Ink Limits – Set the ink limits for the Paper Profile. These are determined after printing a chart and observing the percentage of coverage at which the mixture of inks causes problems. Enter the value for each ink combination. • Algorithm – Choose the type of ink limiting. There are three (3) options: o Standard – Simple ink limiting based on ink percentages. o Enhanced – Like Standard, but optimised for variable dot printers. It uses intelligence to calculate the ink limits based on dots used. o Linear 3.0 – This setting adds the ink coverage for any area then proportionally limits, according to the ink limit range it falls within. For example, with 3-­‐ink set to 300% and 4-­‐ink set to 400%, if a 6-­‐ink area of an image has a coverage of 320%, it will limit the area according to the 3-­‐4 ink range. o Linear 4.0 – (Default) This method limits inks based on the number of inks being used for an area. For example, if 5-­‐ink is set to 390%, any time 5 inks are laid down their coverage will be limited to 390%. o Linear, favour Black – As more ink is laid down and a colour area approaches Black, this method limits CMY proportionally more than Black, preventing wetness and inversion in shadowed areas. o Lowpass – No limiting is imposed until the coverage for combined number of inks reaches the set limit, at which point any higher ink coverage is clipped to the ink limit. o Lowpass, favour Black – The same as Lowpass, but favouring Black, limiting it proportionally less than CMY as colours approach Black. • Media Information – This side of the screen displays information about the driver and Media configuration important to the Paper Profile. Serendipity Blackmagic User Manual – Version 5.4.03 – Updated 16th July 2014 56