You can place the same ink into different slots multiple times. If you do so, the Double Ink… button is activated and lets you specify the behavior of those inks.
Channel: Toggle between the multiple inks. For each ink, you can set an individual curve behavior. The use of multiple inks is basically to make the total color get darker or more saturated. Setting different behaviors for each channel enables special effects, such as minimizing dithering in lighter areas. A consideration in this software-based approach of multiple inks lies in the fact that certain printheads are more used than others. Finally, the combination of multiple inks, including all the set parameters, is linearized as one new ink. We recommend that at least one channel should be linear and that you should NOT change the parameters after you have linearized the combo. Absolute ink limit calculates the total sum of inks and compares it to the defined maximum value. If this is higher than lower, all the inks proportionally, except the Black, to keep the shadows. When you have two blacks in the inkset, you have to decide which one of the two will remain untouched after the ink limit reduction. Therefore the checkbox Master Black becomes available in a combination of double black inks only. Here one of the black inks can be selected and set as the master black ink to keep untouched.
View curve: It presents the behavior of the curve for the selected ink. Make sure that it looks smooth if you want to obtain homogeneous results. You can change the Start, Body, and End by increasing or decreasing the values below.
- Start: This value defines where the ink starts. 25 means that the selected channel will not print below 25% of the original coverage.
- Body: This value defines where the ink starts. You can try different values to evaluate which ones are the most suited to deliver a smooth shape. 75 is a good value if Starts at 25% and Ends at 100%.
- End: This value should usually be set at 100 since the idea is to get a darker color. Note, however, that in some cases you might have too much ink, and you may have to reduce it in the ink cut procedure, which will be explained further in this manual.