How to Troubleshoot DTF Print Color Differences

Layer-by-layer troubleshooting when the color is wrong

Troubleshoot Print Color Differences | Image Preparation | For LINKO DTF printers | RIP software (PrintFactory) | Windows and the English interface of Adobe Photoshop

1. What this document covers

When a printed color does not match what you expected, the cause sits in one of three layers. This document works from the file to the process. It rules out the cheapest causes first, and changes print settings last.

Important: If repeat prints are stable and your only reference is an ordinary computer screen, See Why Print Colors Differ from Screen. Compare the print with a confirmed physical sample, a standard color, or earlier stable production. If the difference is clear, continue with the three checks in section 1.1.

1.1 Three checks to run first

These three checks need no tools. They narrow the search to one or two chapters before you change any setting.

Check 1: print the same job again. Do the prints match each other?

They do not match → a stability problem. Check the printhead, white ink settling, and temperature. Go to chapter 4.
They match → go to check 2.

Note: If you have printed only one copy, you cannot judge consistency. Start at check 2.

Check 2: what are you comparing the color against?

An ordinary computer screen → read Why Print Colors Differ from Screen first.
A confirmed physical sample, a standard color, or earlier stable production → go to check 3.

Check 3: is the problem in one image, or in every image?

One image only → the file layer. Go to chapter 2.
Every image shows a similar shift → the RIP software (PrintFactory) settings or the process layer. Go to chapters 3 and 4.

Note: Answer the three questions in order: is it stable, what are you comparing against, one image or all of them. Narrow the search first, then open the matching chapter.

1.2 Quick reference table

Find your situation in the table below, then go straight to the section named.

What you see	Most likely cause	Check first
Differs from the screen, but prints match each other	Screen and medium difference	Why Print Colors Differ from Screen
Colors overall are not deep enough, or look grey	The image is not deep enough, or the white ink underbase is thin	2.1 → 3.2
Black areas look grey or not black enough	The black in the image is not pure black	2.3
Every job shows a similar shift	Check the print profile, color settings, and white ink settings in the RIP software (PrintFactory)	3.1, 3.2
Prints differ from each other	Missing nozzles, or white ink settling	4.1, 4.2
Color changed or yellowed after pressing	Press temperature or press time	4.3
White turns pink hours after pressing	Polyester dye migration	4.4
Banding across the print	Equipment side. Unrelated to the image and to color.	4.1 / contact support

1.3 Troubleshooting order

Important: Changing print settings before checking the earlier layers leads to wasted work. Print settings cannot fix a file-layer problem. The settings end up at a position that compensates for one faulty file, and every normal file then prints wrong.

2. Layer 1: the file

Why this matters for DTF: Check the file layer first, because it costs the least to check and needs no change to any print setting. Once a file-layer problem is fixed, that image is fixed permanently. Work through the table below.

Item	How to check	What to do if it is wrong
Color mode	Image → Mode. See which item is selected.	RGB can be printed directly. No forced conversion is needed. See Check Print-Ready Images section 2.4.
Image color profile	Edit → Convert to Profile. Read “Source Space”.	Delivering everything as sRGB is the most reliable option.
Black depth	Click a black area with the Eyedropper Tool. Read the RGB values.	If the area is meant to be pure black but is not 0 / 0 / 0, see Fix Dull or Grey Blacks.
Format and compression	Check whether the file is a PNG with a transparent background, a PSD, or a repeatedly saved JPG.	Go back to the original file and export again. See Check Print-Ready Images section 2.3.

2.1 Color mode

An RGB image can be printed directly. No conversion is needed for printing. RGB and CMYK do print differently, but neither is better in every case. Judge by the printed result and by your own preference.

If the printed result is already stable, you can try a different appearance. Print a CMYK comparison sample as described in Check Print-Ready Images section 2.4. To keep CMYK, save as TIFF, PSD, or PDF.

Important: PNG is not used to keep CMYK. If you export PNG after converting to CMYK, the file returns to RGB. To keep CMYK, save as TIFF, PSD, or PDF. JPG is not a print delivery format for LINKO DTF.

2.2 Image color profile

To check: click Edit → Convert to Profile. The Source Space field at the top shows the image color profile currently embedded in the file.

Adobe RGB and ProPhoto RGB both cover a wider color range than sRGB. Software does not always interpret these profiles the same way. Delivering everything as sRGB is the cheapest and most stable option.

Important: Keep two functions apart. “Convert to Profile” changes pixel values so that the color appearance stays the same. “Assign Profile” leaves pixel values unchanged, so the color appearance changes. Use “Convert to Profile” when troubleshooting a color shift.

2.3 Black is not deep enough

Click a black area with the Eyedropper Tool. Read the RGB values in the Info panel.

The area is meant to be pure black and shows 0 / 0 / 0 → no further change to the black is needed. If the print still looks grey, go to chapters 3 and 4.
The area is meant to be pure black but is not 0 / 0 / 0 → handle it with Fix Dull or Grey Blacks. An area that is dark grey by design is not a fault.

2.4 Format and compression

A JPG saved repeatedly accumulates compression damage. Shadow areas and gradients break up first.
An 8-bit PNG holds only 256 colors. Gradients then show visible steps.
Deliver a PNG with a transparent background for printing. Keep the source file as PSD or TIFF. See Check Print-Ready Images section 2.3.

3. Layer 2: RIP software (PrintFactory) settings

Important: Two settings must be kept apart. One is the image color profile in the file, such as sRGB, Adobe RGB, or ProPhoto RGB. The other is the print profile used by the RIP software (PrintFactory). The image color profile belongs to the file and is viewed in Photoshop. The print profile belongs to the RIP and is selected in the RIP software (PrintFactory).

This layer is set once and then affects every job. A problem here shows as a systematic shift. Does every job shift in a similar way? Check the print profile, the color settings, and the white ink settings in the RIP software (PrintFactory) first.

3.1 Does the print profile match?

The print profile decides how much ink reproduces a given screen color, for the current combination of ink, film, and printhead. It is a separate setting from the image color profile in the file.

Important: LINKO engineers build each print profile for a specific consumable set, with the ink limit already configured. Do not modify a print profile yourself. Modifying it can cause ink pooling, ink that does not cure, and poor powder adhesion. If you suspect the current profile does not match, contact technical support and test another profile.

View and switch the current profile: Select ICC Profile
Import, back up, or delete a profile: Manage Print ICC Profile

Why this matters for DTF: The print profile carries an ink limit. Anything above that limit is cut off automatically. Raising color strength in the image, or stacking ink manually, therefore sends nothing extra to the printhead. To get stronger color, switch to a more suitable print profile instead of adding ink in the image.

3.2 White ink underbase amount

Why this matters for DTF: DTF prints a white ink underbase on the fabric first. How bright the color layer looks depends on how opaque that underbase is. When the white ink amount is too low, the fabric color shows through, and every color looks darker and greyer. This is specific to DTF, and it is often mistaken for poor ink quality.

Adjust the white ink amount: Set White Ink Usage
Select the underbase method: Set White Undercoat Method
Set the white layer choke: Set White Layer Choking

Important: Confirm the file layer in chapter 2 before you change the white ink amount. Tuning the white ink against a faulty file moves the setting to a position that compensates for that one file. Every normal file then prints wrong.

4. Layer 3: print and press

This layer comes last, because changes here cost the most and affect the widest range of work. Confirm the first two layers before you change anything in this chapter.

4.1 Blocked Nozzles or Missing Nozzle Lines

What you see: color shifts in one direction, for example towards red, which can relate to a shortage of cyan ink. Regular stripes may also appear.

How to check: print a nozzle check and look for missing lines.

What to do: run a cleaning cycle. See Printhead Clean (BYHX) or HOSON. If lines are still missing after cleaning, contact technical support.

Note: Banding across the print is an equipment-side problem. It is unrelated to image editing and to color settings. Editing the image repeatedly does not remove banding.

4.2 White ink settling

The main pigment in white ink is titanium dioxide. It is much denser than other pigments, so it settles and separates quickly when left standing. A settled white ink gives an uneven underbase with low opacity. Colors then look grey and patchy, and different areas look different.

4.3 Press temperature and time

Too high a temperature, or too long a press, can cause yellowed ink, blurred design edges, press marks, and scorching on the fabric. Too low a temperature causes poor adhesion, and the print washes off.

Important: Take the temperature, time, and pressure values from the instructions for the film and powder you actually use. Values differ widely between brands. This document does not give general values. For equipment-side settings, see the documents under “6.3 Heat Press Machine”.

How to adjust: change one variable at a time and compare small samples. Base the adjustment range on the recommended values for your current film, powder, and fabric.

4.4 Polyester dye migration (color change after pressing)

What you see: the print looks correct right after pressing. Hours or days later, white areas turn pink or yellow, and light colors shift.

Cause: polyester fabric uses disperse dye. At high temperature the dye sublimates and migrates into the ink layer. Dark polyester, especially red and navy, is most affected.

What to do:

Lower the press temperature and shorten the press time. See section 4.3.
Test a new fabric on a small sample. Wait 24 hours after pressing, then check the color.

Note: The key sign of dye migration is that it appears late. If the color shifts gradually some time after pressing, suspect polyester dye migration first. Start troubleshooting from this section. You do not need to adjust the image or the print profile first.

5. If the problem remains

If the problem is still there after all three layers, send the following to technical support. It shortens the handling time considerably.

The original file of the problem image, not a screenshot
A photo of the printed result, with the fabric color and material noted
The name of the print profile in use, and the white ink settings
The brand and batch of the ink, the film, and the powder
The press temperature, time, and pressure
The items you have already checked in this document

6. Frequently asked questions

Q: The print color differs from the screen. Should I troubleshoot with this document?

A: Run the three checks in section 1.1 first. If your only reference is an ordinary computer screen, and repeat prints are stable, read Why Print Colors Differ from Screen first. Compare the printed result against a confirmed physical sample, a standard color, or earlier stable production. If it differs clearly, use the matching chapter here. Do the same for the situations listed in the table in section 1.2.

Q: If I raise the color strength in the image, will the print be more vivid?

A: Only up to a point. The print profile used by the RIP software (PrintFactory) already carries an ink limit, and anything above it is cut off automatically. Stacking ink in the image sends nothing extra to the printhead. For weak color, work through the layers in this document instead of adding ink in the image.

Q: Can I adjust the print profile myself?

A: This is not recommended. LINKO engineers build each print profile for a specific combination of ink, film, and printhead, with the ink limit already configured. Adjusting it yourself can cause ink pooling, ink that does not cure, and poor powder adhesion. If you suspect the profile does not match, contact technical support and test another profile.

Q: The color was correct right after pressing but changed the next day. Why?

A: This is the typical sign of polyester dye migration. See section 4.4. The key sign is that it appears late. If the color shifts gradually some time after pressing, suspect dye migration first, rather than a print or file problem.

Q: How do I tell quickly whether the cause is the image or the equipment?

A: When colors overall are not deep enough or look grey, work through the three layers in this document. Do not conclude from that single symptom that the image is at fault. Banding across the print is an equipment-side problem. Contact technical support for banding.

7. Related Documents

7.1 Image Preparation

Check Print-Ready Images— Entry document for this set. The 7 checks to run before printing.
Clean Image Edges— White edges, grey edges, and unwanted semi-transparent edges.
Fix Dull or Grey Blacks— Black areas that print grey or not dark enough.
Why Print Colors Differ from Screen— Read this first to decide whether to rule out screen and medium differences.

7.2 RIP Software (PrintFactory) Settings

Set White Ink Usage, Set White Undercoat Method, Set White Layer Choking
Manage Print ICC Profile, Select ICC Profile
RIP File Processing & Output Workflow— File processing and output workflow.

LINKO Technical Support
Email: support@dtflinko.com
Website: www.dtflinko.com