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Comment: Published by Scroll Versions from space COLORFLOW and version 8.2
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You can characterize the color and tonal response of each device condition to generate color control elements that produce the color you want on output. Color and tonal responses describe the relationship between input tint values of a digital file and the output values on a printing device, which characterize the resulting colors and tones that appear.

Color response is categorized into three types:

  • Full Color response: The relationship between input tints and output colors in CIELAB, representing all possible process ink tint values on the device. You can generate Gray Balance curves and ICC profiles, from a Gray Balance response.
  • Gray Balance response: The relationship between input tints and output colors in CIELAB, representing primarily the Black and near-neutral CMY tint values on the device. You can generate Gray Balance curves, but not ICC profiles, from a Gray Balance response.
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    Tonal response
    : The relationship between input data and:
    • for CMYK inks, the resulting Effective Dot Area (EDA) on the printed press.
    • for extended process inks, the resulting spot color tone value Spot Color Tone Value (SCTV) on the printed press.
    • for spot inks, either or both of the resulting EDA or SCTV on the printed press.

You can characterize color or tonal response by exporting a built-in or a custom measurement chart in ColorFlow, printing the chart using Prinergy, and then measuring the printed chart using a ColorFlow supported measurement device. The type of tonal or color response that you obtain from a chart depends on the type of chart that you measure

Depending on how you print the chart in Prinergy, you can characterize the color or tonal response of a device condition by the following two methods:

Method 1 (only for curve-controlled devices): 

  1. In ColorFlow, add the device and define the device condition.
  2. In the device condition, create choose and export a measurement chart.
  3. Create a custom print transfer curve to control the response of the device. This step is optional. ColorFlow provides several built-in transfer curves for you to use. You can create a custom transfer curve if you don't want to use the built-in transfer curves. For flexographic presses, you should always create a print transfer curve to control the Mindot behavior.
  4. In Prinergy, output and print the chart by selecting a built-in or the custom transfer curve in the Process Template.
  5. In ColorFlow, measure the printed chart.
    Note: At the beginning of the measurement wizard, a dialog box appears asking you to specify the print curve you used to print the chart. In the dialog box, from the Print Curve list, select the print transfer curve you created.
    After the measurement is completed, the color response for the device condition is established and the print transfer curve you created becomes the device curve of the device condition. That device curve will be included in the print calibration curve delivered to Prinergy for output to the device.

Method 2 (for all types of devices):

  1. In ColorFlow, add the device and define the device condition.
  2. In the device condition, create choose and export a measurement chart.
  3. For a curve-controlled device, define the device curve to control the response of the device.
  4. In Prinergy, output and print the chart by selecting the device and the device condition. For a curve-controlled device, select the Print Characterization mode.
  5. In ColorFlow, measure the printed chart
    Note: For a curve-controlled device, at the beginning of the measurement wizard, a dialog box appears asking you to specify the print curve you used to print the chart. In the dialog box, select the Selected by Prinergy Color Relationship Management: Print Characterization Mode check box.
    After the measurement is completed, the color response for the device condition is established and the device curve you created is associated with the measurement. If you redefine the device curve, you must redo your measurement.

You can also characterize color responses of a device condition by the following:

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您可以描述每个设备条件的颜色和色调响应特征来生成颜色控制元素,这些元素可生成要输出的颜色。颜色和色调响应描述数字文件的输入色调值与印刷设备上输出值之间的关系,描述了所显示结果颜色和色调的特征。

颜色响应分为三种类型:

  • 全色响应CIELAB 中输入色调与输出颜色之间的关系,表示设备上所有可能的印刷油墨色调值。可以从灰色平衡响应生成灰色平衡曲线和 ICC 配置文件。
  • 灰色平衡响应:CIELAB 中输入色调与输出颜色之间的关系,主要表示设备上的黑色和近中性 CMY 色调值。可以从灰色平衡响应生成灰色平衡曲线,但不能生成 ICC 配置文件。
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    色调响应
    :输入数据和印张上形成的有效网点区域 (EDA) 之间的关系。在 ColorFlow 8.3 及更高版本中,对于专色和扩展印刷油墨,色调响应可能还包括专色色调值 (SCTV) 响应。

您可以 characterize 颜色或色调响应,方法是导出 ColorFlow 中的内置或自定义测量图表,使用印能捷印刷该图表,然后使用 ColorFlow 支持的测量设备来测量印刷的图表。从图表中获取的颜色或色调响应类型取决于您测量的图表类型。 

根据在印能捷中印刷图表的方式,可以通过以下两种方法描述设备条件的颜色或色调响应的特征:

方法 1(仅适用于曲线控制设备): 

  1. 在 ColorFlow 中,添加设备并定义设备条件。
  2. 在设备条件中,创建测量图表
  3. 创建自定义印刷传送曲线以控制设备的响应。这是可选步骤。ColorFlow 提供多个内置传送曲线供您使用。如果您不希望使用内置传送曲线,则可以创建自定义传送曲线。对于柔性版印刷机,务必创建印刷传送曲线来控制 Mindot 行为。
  4. 在印能捷中,通过在处理模板中选择内置或自定义传送曲线来输出并印刷图表。
  5. 在 ColorFlow 中,测量印刷的图表
    注意:在测量向导开始时,将显示一个对话框,要求您指定要用于印刷图表的印刷曲线。在此对话框中,从印刷曲线列表中选择您创建的印刷传送曲线。
    完成测量后,将建立设备条件的颜色响应,并且您创建的印刷传送曲线将成为设备条件的设备曲线。该设备曲线将包含在发送到的印刷校准曲线中,以供输出到设备。

方法 2(适用于所有设备类型):

  1. 在 ColorFlow 中,添加设备并定义设备条件。
  2. 在设备条件中,创建测量图表
  3. 对于曲线控制设备,定义设备曲线以控制设备的响应。
  4. 在印能捷中,通过选择设备和设备条件来输出并印刷图表。对于曲线控制的设备,请选择印刷特征模式。
  5. 在 ColorFlow 中,测量印刷的图表
    注意:对于曲线控制设备,在测量向导开始时,将显示一个对话框,要求您指定要用于印刷图表的印刷曲线。在此对话框中,选中通过印能捷颜色关系管理选择:印刷特征模式复选框。
    完成测量后,将建立设备条件的颜色响应,并且您创建的设备曲线将与测量相关联。如果重新定义设备曲线,则必须重新进行测量。

您还可以按照以下方法描述设备条件的颜色响应:

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