Here is a copy and paste from the v3 instructions from my support site:
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- Step 1: Compare the areas where the transparency material covered is the same density as the coated edges to get your standard exposure time.
- Step 2: Find the white patch in that strip to find the blocking density for the time and process you are using.
- Step 3: Open the QuadToneProfiler-DN app and go to the Starter Curve Setup screen and change the boost slider so that the maximum black percentage label reaches that blocking density from step 2.
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The total ink load scales all the inks up and down by the percentage in the slider, and is what is used for using the open bite test utility for direct to plate photogravure. I generally recommend not adjusting this slider for the blocking density when using digital negatives, and only increase it it if the print from first linearization test is much too dark.
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The Black Ink Boost is what you will use to increase the blocking density for the Black and Yellow channels (which are now combined into a single control and not two separate controls like they were in the v1 and v2 of the QCDN apps)
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Richard Boutwell