HQ-510 RIP linearization adjustment

HQ RIP is used by several vendors as soft RIP, and is now used in many print and export centers in Japan. Since the HQ RIP is an English menu, it is troublesome for the user. During the use of RIP, linearization adjustment is often done. Here we introduce the HQ-510 RIP linearization adjustment.

When the developer syrup concentration, fixation temperature, and phototyper light value are adjusted, set the page in RIP, pay attention to the precision and dot shape to be adjusted, different precision, dot shape, negative film The linearization data used is different. Then click on the "Print Calibration" menu under the "Output" menu. As shown in Figure 1, the interface shown in Figure 2 appears.

In this interface, it should be noted that "Print uncalibrated target" means to output the unadjusted curve, and "Print calibrated target" means to output the adjusted curve. When doing linearity for the first time, first select the output precision (ie, the precision determined in the page setup) in the box under “From Page Setup(s)”, then select the Print uncalibrated target. . Imagesetter will output the linearized test strip as shown below. Use a transmission densitometer to measure the actual percentage of dots in the box below each displayed value and record it. (The line "Uncalibrated Target for device '5055':uncalibrated" at the top of the test bar indicates that this test strip was output from the device driver name "5055". The linearized data has not been adjusted; the lower part of the text indicates the output. Accuracy, number of lines, dot angle, dot shape; “Max/Min” and the following black and white boxes are solid and blank parts. Before measuring the dot percentage, the two boxes can be used to measure the solid density and clear the density meter on the film. The middle of the film is the area that needs to measure the percentage of the dot, and the number of 0.0-100.0 is the percentage value of the dot that the dot should reach. The area under each dot is the density meter measurement area.)

The interface shown in Figure 3 will appear on the "Calibration Manager" menu screen under the "Output" menu.

There is no option available in dialog 1 when doing the linearization for the first time. You need to press “New” to create a new one. Before pressing, check whether the "Device" item is placed on the imagesetter you have built (how to create a new "Device" will be mentioned in a later article). The choice of "Color Space" is based on the RIP required during the distribution. The color separation is still determined by color separation in the distribution software (generally, color separation is not required in the RIP, and color separation can be performed in the distribution software. This item is also selected in the page setting, and the setting thereof is referred to). , The linearization data used by the two are different. Take color separation in the distribution software as an example. Select "Monochrome" for "ColorSpace" and click "New" to see the following interface:

In this interface, “Resolution” indicates the required accuracy, which is consistent with the accuracy of the previous page setup. "Vertical" table vertical direction, "Horizontal" table horizontal direction, there is no special requirement for the same accuracy in both directions. "Dot shape" table dot shape, this selection must also be consistent with the previous page settings. The number of screen lines corresponding to the accuracy of the “Screen freq” table is generally 1200dpi for 75-100lpi, 2400dpi for 106.4-180lpi, and 3000dpi for 120-205lpi. When the accuracy of 3000 dpi needs to output a line number of 100 lpi, it is different from the linear data used in the line number described above, and it needs to be done by itself. The “Use for Pos & Neg” table applies this linearized data to both negative and positive films. Although this item was selected, it has been mentioned in actual use that the same linearized data cannot be used for negative films. "Name" is to name this linearized data. The naming principle is: Do not use Chinese as much as possible; the name should be easy to identify and easy to understand. It can be so named: Accuracy - dot shape - film brand, such as AGFA film, 2400dpi round square point of linearization data can be named: 2400-Eud-AGFA. The "Channel" table outputs monochrome or four-color, simply select "Gray". The “Measurements as” table appears as a negative or positive film when measuring. Usually, “Positive% Dot” is selected as the positive dot. "Negative media table uses negative film, this item will only be used when doing linear adjustment of negative film. "Force Solid Colors" select this item to use this linearized data for spot color.

The values ​​from 0.0 to 100.0 that appear below these menus correspond to the percentage of dots in the linearization test strip from 0% to 100%, and the percentages of the actual dots measured in the linearization test strip are entered in the box below. In the bottom row of buttons on the interface, "Smooth" is sleek. After adjusting the curve, press this button to make the dot compensation more sleek (press the button after all the data is input); "Clear" will be The input value is cleared; "Reset" is reset; "import" is input (this item is basically not used).

After this interface is set up, press “OK” to exit the interface as shown in Figure 4, and return to the interface as shown in Figure 3. In dialog box 1, the linearized data just named is displayed. In the box, the "Name" table linearizes the data name; the "Resolution" table linearizes the precision of the data; the "Dot" table linearizes the dot shape of the data; and the "Freq" table linearizes the number of data controlled lines; “Whether the linearized data of the table is selected for both yin and yang tablets; “Status” indicates whether the linearized data has been adjusted and used, the “D” table has not been adjusted for this linearized data, and the linearized data of the “E” table has been Being adjusted, the linearized data of the "U" table has been adjusted and used. After the check is correct, click "OK" to complete the linearization data setting and exit the interface shown in FIG. At this point you need to check the linearization data you have made. Then open the interface as shown in Figure 2, select the accuracy of the previous, this time need to select the output calibrated curve (Print calibrated target), photosetter output linearization test strip (the upper line of text becomes "Calibrated Target for device '5055': Calibrated” table This linearized test strip has been adjusted). The densitometer is used to measure the percentage of outlet dots output. The error between the actual measurement value and the displayed value of each column of the linearization test strip is between 1% and 2%.

In the interface shown in Figure 3, "Edit from uncalibrated target" indicates that the editor has not adjusted the curve, and "Edit from calibrated target" indicates that the editor has adjusted the curve. The choice of these two items corresponds to whether the linearized test strips are calibrated or not. When the linearization correction is performed for the first time, select “Print uncalibrated target” in the interface shown in Fig. 2. After outputting the linearized test strip, click “Edit” in the interface shown in Fig. 3. From uncalibrated target; if you select "Print calibrated target" again when outputting, linearize the output of the test strip, if the dot percentage is actually measured with the linearization test strip Each column shows a large amount of error and you need to click "Edit from calibrated target" to edit the data again. Click "Edit from calibrated target" and the interface shown in Figure 4 is the same as the one shown in Figure 4. The editing method is the same as the method described above. Enter the measured data into the box and click "Smooth". New Zealand will complete the re-editing work. Then repeat the above work until you are satisfied. In general, HQ RIP only needs to edit “Edit from uncalibrated target” once, and “Edit from calibrated target” once can get good linearized data.

In addition, when changing different brands of film, you need to start from the output of the uncorrected curve. When you replace the developer solution or turn on the linear adjustment curve every day, you only need to start from the output calibration curve. The HQ-310 RIP linearization adjustment is basically the same as that of the HQ-510 RIP, and can be done by referring to the above steps and interfaces.