Creating a test chart

When creating the test chart, it is important not to use the preset primary colors CMYK, but to select the primary colors we have determined via the drop-down menu, in addition to Gray, RGB, CMYK and various multicolor options, the loaded file should also be displayed. The number of the fields should be set to 418. If the input is confirmed with Start, the main window of the program now shows that a 3CLR-418 chart has been created, which contains 418 fields, has 3 primary colors, but is not a color space (NoSpace), because it is only about color values, which are not related to each other yet.

Next, mark the line of the chart. In the lower left area of the tools click on Export Chart, so a new pop-up opens, in which test chart specific information can be entered to create the chart in order to make it compatible to the respective spectral measuring device. When exporting the chart, it is important that the type of spectral measuring instrument appears within the name of the preset, e.g. the i1i0 instrument from x-rite. Again, confirmation is done with Start, so a Photoshop document can be saved to a desired location. In addition to the Photoshop document, basICColor IMProve exports a reference file in text format, which contains all contents of the color fields. This is important for later comparison, again in basICColor IMProve.

The other file is an XML file that is used to define the measurement within basICColor catch. First the Photoshop file is opened to save the individual channels in grayscale TIFFs. In the channel selector of Photoshop the single channels can be selected and saved one after the other or automatically separated into three files by the Split Channels function. When placing these grayscale TIFFs in a layout program, e.g. Adobe InDesign, it is important to place text frames on each page (representing each color separation) to keep track of three almost visually identical color charts afterwards. In addition, notes such as a screen frequency or angle can be noted so that printing the data on the risograph is easier.