Printing without color management

Of the first twenty failed calibration prints we saw come through at Maison Picturale, seventeen had the same symptom and the same cause. The symptom: the curve generated by Calibration Flow doesn't correct the print properly, even after several calibrations. The cause: the printer applied a colorimetric correction to the chart's PNG before printing it. The result: Calibration Flow corrects a non-linearity that isn't the process's — it's the driver-printer chain's. Once the curve is applied to a real image, it goes off the rails.

The rule is absolute and fits in one sentence: nothing, between the chart's PNG and the ink drop on the transparency, should apply a colorimetric correction. This page lists the exact buttons to uncheck depending on your gear.

#How it works

A standard print chain generally contains three stages where color management can creep in:

1. The application that launches the print (macOS Preview, Adobe Acrobat, Photoshop, the browser). Each has its own print dialog with sometimes a "Color Management" menu.
2. The printer driver (Epson, Canon, Brother). Each driver has a "Color Matching", "Color Mode", "Profile" tab that can convert the color space at the moment it's sent to the printer.
3. The printer itself, which can have an internal auto-correction setting (often on by default on consumer photo models).

The goal: disable all three. The PNG generated by Calibration Flow already contains the chart in pure grey levels (R=G=B), with no embedded ICC profile. What must land on the transparency is exactly what's in the PNG. Not a saturation adjustment, not a gamma fix, not a profile conversion.

On Adobe Photoshop (recommended for test charts):

• File → Print
• In the "Color Management" area, set "Printer Manages Colors" to off
• Choose "No Color Management" in the profile menu
• Confirm that "Simulate Paper Color" is unchecked

On macOS Preview:

• File → Print
• "Show Details" button if it's collapsed
• Central drop-down menu → choose "Color Matching"
• Check "In printer" (instead of "ColorSync") — paradoxically, that option disables system management and leaves the printer in native mode. Then confirm that the printer itself applies nothing (step 3 below).

On the Epson driver:

• "Color Management" tab
• Select "Off (No Color Management)"
• If only "Adobe RGB" and "sRGB" mode is offered, choose sRGB with no conversion

On the Canon driver:

• "Color Settings" tab
• Uncheck "Enable ICM" and "ICC Profiles"
• Select "Auto" or "Neutral" mode

On the printer itself:

• Printer menu → Settings → Print Quality
• Disable "Photo Enhancement", "Vivid Color", "Auto Correct" and any equivalent setting
• If present: enable "Raw mode" or "Raw"

#Why it matters

A color management applied invisibly to the chart overrides the linear behavior Calibration Flow expects. Concretely: if your driver applies an sRGB→Epson Custom Profile correction, it will lighten the patches around 30% and darken those around 70%. When Calibration Flow measures the chart and computes the correction curve, it will correct that gap. You get a curve that compensates both the chemical process's non-linearity and the driver's correction. The problem: the driver's correction only applies to the chart, because you printed a PNG generated by Calibration Flow. When you then print your final photo, the driver applies its correction to that photo too — and the curve (which thought it was compensating both the chemistry and the driver) ends up applied twice.

The final print comes out overcompensated, and nobody understands why, when the chart looked correct.

Disabling color management resolves this double correction. The chart is printed linearly. The curve only compensates the chemistry. When you apply that curve to any image and print it (still without color management), the process's non-linearity cancels out exactly.

#When to avoid it

There's no case where you want to enable color management to print a calibration test chart. This section exists to confirm: no exception. If someone tells you otherwise, they're describing a full ICC workflow (negative + print profiled via ICC), which is a different approach that Calibration Flow doesn't implement. In the Calibration Flow workflow, you disable everywhere, period.

#Key points

#The test

Print the A4 negative chart on a transparency. Lay it on a sheet of white paper in a well-lit spot (daylight, indirect). Compare the patches visually: the transition from pure white (patch 0) to full black (patch 24) should look roughly progressive to your eye, with no obvious breaks or plateaus. If you see five almost-identical patches in the middle, followed by very different patches, you have a stray correction somewhere. Start over, reviewing the three stages.