Create QuadTone RIP Curve
From Digi Wiki
THIS TUTORIAL HAS BEEN UPDATED TO REFLECT CREATING QUADTONE RIP CURVES WITH THE QTR-PRINT-TOOL
This tutorial is based on the following assumptions:
- You have installed QuadTone RIP printers and the QTR-Print-Tool.
- You have a working knowledge of using the X-Rite i1 Spectrophotometer.
- You have installed ColorPort 2.0.5 from X-Rite.
- You have the required time and paper available. This process takes several days and several sheets of paper to create the curve and test.
- You are logged in as the isis user (or some other user account with administrative privileges).
Required Hardware and Software
- QuadTone RIP
- X-Rite ColorPort 2.0.5
- Supported Spectrophotometer
- X-Rite i1 Spectrophotometer
Create the New Curve
- You can create new curves based off the raw curves listed for each printer. Optionally, you can use a curve for a paper similar to the new paper you are profiling.
- Open the existing curve in TextEdit
- You will have to right click the quad file and select 'Open With' and select 'Other...'.
- Choose TextEdit from the menu.
- Scroll to the bottom of the document. If there is a line with the word 'Linearize', delete that line and any following numbers.
- Save As in the Profiles Directory and close the text document.
- Run the Install<PrinterModel>.command script to install the new curve. If there are errors when running the script, follow given directions to correct the errors and run the script again.
- If you were installing a curve on the Epson 4880, you would run the Install4880.command script
Printing the Target
- Open QTR-Print-Tool
- Select your Quad#### printer
- Click the 'Page Setup' button and set your paper size
- The target to print is small and can fit easily on 8.5x11
- Open the QTR Eye-One Target
- Applications/QuadTone RIP/Eye-One/Step-51-gray.tiff
- Rotate the target to print in landscape mode
- Color Management Settings:
- Set Color Management Mode to 'No Color Management'
- Check '16 bit'
- Overview of what the QTR-Print-Tool main window should look like
- Click the 'Print' button to open the print dialog
- Change from Layout to Printer Features to make sure you are using the Matte Paper media type
- Change from Printer Features to QuadTone RIP to set your curve settings
- Set your mode to QuadTone RIP 16-bit
- Set your curve to UCpk-raw-neutral
- You can set your curve to raw-warm or raw-warmer to create a toned curve
- Set your paper feed - sheet or roll with cutter on or off
- Set your Resolution - all curves are created for the 2880 print resolution unless your paper cannot handle more than 1440 Super Resolution
- Set your Speed - Uni-Directional is recommended as it instructs the printer to lay the ink down once per pass
- This is the same as turning High-Speed printing off in the Epson Driver
- Click 'Print' to send the target to the printer
- Allow the print to dry at least 24 hours.
- Overview of what the Print Dialog should look like.
Scanning the Target
Open ColorPort 2.0.5
- If you haven't done so, download and install X-Rite ColorPort 2.0.5
- ColorPort is X-Rite's free target creation and scanning software. The software is, however, unable to print targets so you will need an application such as the QTR-Print-Tool for output without color management.
- Download and install the .xml target files:
- You can download the .xml files here
- Save the targets to Macintosh HD/Users/Your Account/Documents/ColorPort_Resources/refs/cmyk and restart ColorPort
- Select 'Measure Target' Tab
- Select Target
- Select Measurement Device
- Select Target
- Overview of ColorPort Settings
Calibrate the i1
- Click the grey 'info' button in the Measurement Device section
- The i1 Configuration window will open
- Set Measurement Mode to Spot
- Click Calibrate
- The Calibration dialog will open.
- Place the i1 on the cradle and click calibrate
Scan the Target
- Place the target in the scanning tray
- It is helpful to put the target in the tray upside-down to easily target the first patch with the i1
- Place the i1 over the first patch
- Press the button on the i1 to measure the first patch
- Hold the button down long enough for the i1 to measure the target. You will see a light flash under the i1 and the system will emit a single tone when the patch has been measured. After this tone, release the button and move the i1 over the next patch.
- Repeat steps until all 51 patches are measured
- Click the 'Save Data' button.
- This button will be grayed out until all patches have been scanned
- Save Options:
- Format: Tab Delimited
- Conversion: None (XRGA)
- Line Endings: Macintosh
- Device Values - unchecked
- Lab - checked
- LCH - unchecked
- XYZ - checked
- Illuminant - D50
- Observer - 2
- Custom - unchecked
- Overview of Save Options:
- Save the .txt file in an easy to find location.
Create and Add Linearization Data
- Open a new Finder window
- Navigate to the Applications/QuadTone RIP folder
- Click and drag the file on the QTR-Linearize-Data droplet in the main QuadTone RIP directory
- A new file named [yourfilename]-out.txt will be created and should automatically open in TextEdit.
- Scroll to the end of this file and locate the line that starts with "Linearize".
- Copy this entire line, including the numbers.
- Open the curve you created in the Create the New Curve step with TextEdit.
- Paste this Linearize line in the end of the file and save the changes.
Install New Curve
- Locate the Install####.command file
- This file is located in every folder for which there is an installer for QuadTone RIP. This folder is dependent on the model of printer you are creating a curve for.
- Double click the Install####.command file to run the installation command in Terminal. This will install any curves that have been added to the folder to the existing printer as well any changes you have made to the .txt files.
- You will have to restart the QTR-Print-Tool after you run this command for the new Curve to be available in the QTR print driver.