quadGEN

Printer:

.quad

Input Level %

Output Ink Level %

Scale:

	Channel	Correction	Status	Percent (0–100)	End (0–65,535)	Density (0–1)

📝 .quad File Preview

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Plot smoothing: 0% (×1.00)

Select Channel

Calculate Error % Points

Select Point

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Nudge Point

On / Off

LUT (.cube), LAB data (.txt), CGATS (.ti3), or curves (.acv)

Auto limits White Black

Intent

LAB smoothing: 0% (×1.00)

Correction gain: %

Use log-density for LAB / Manual

Auto-raise ink limits after import

Manual Luminosity (L*) Entry

The L* component of the Lab color system represents perceived lightness, ranging from 0 (black) to 100 (white). Equal steps in L* correspond approximately to equal perceptual differences in light–dark appearance.

Measure and enter L* values for each patch (e.g., using a device like the Color Muse 2 or Nix Spectro L).
If your chart uses even steps (0, 5, 10 … 100%), leave Patch % as-is.
Edit Patch % for irregular spacing (more steps in the highlights / shadows).
Target result is linear (L* 100 → 0) and linked to Patch %.
Inspired by & compatible with data from the Wedgie tool by Clay Harmon.
A good resource for target images is clayharmonblog.com/downloads.

Patches:

#	Patch %	Target / Measured	L* (0–100)

Channel Builder

Build multi-ink quad files by measuring secondary channel L* contributions

Set up your reference K channel. Print a linear ramp at your chosen ink limit, measure L* values, then enter them below. This is the baseline for computing secondary channel positions.

K Ink Limit Used (%) Ink limit used for your K test print

Enter K channel L* measurements:

7 points

#	Patch %	Preview	L*

Or import from existing quad:

Add secondary channels by entering their L* measurements.

Channel

Ink Limit Used (%)

L* Measurements

7 points

#	Patch %	Preview	L*

Added Channels

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Manual Luminosity (L*) Entry

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Options

Global Correction Help

Global Correction & Intent

Channel Builder