White ink is one of the most important parts of a successful DTF print. If the underbase is too light, colors can look dull and transparent. If it is too heavy, prints may feel thick, lose detail, or develop cracking after curing and pressing.With CADlink Digital Factory V12, you can fine-tune white ink density, underbase behavior, choke and spread, and screening options to achieve a cleaner and more consistent result.
This guide explains the key CADlink V12 white ink underbase settings and how to test them before putting a large customer order into production.
Why Underbase Settings Make or Break DTF Prints
The white underbase acts as the foundation beneath CMYK color in DTF printing. It provides the opacity needed for vibrant colors, particularly when transfers are applied to black, navy, red, and other dark garments.
A poorly configured underbase can cause several problems:
- Low white density: Colors appear faded or washed out.
- Excessive white ink: Prints become unnecessarily thick.
- Poor choke: White edges can become visible around the design.
- Insufficient choke: CMYK can extend beyond the white layer.
- Incorrect screening: Fine details may lose definition.
- Inconsistent ink coverage: Prints can vary across the same production run.
The objective isn’t simply to use more white ink. The goal is to create enough opacity to support the CMYK image while maintaining a soft, flexible transfer.
White Ink vs. Underbase
These terms are often used interchangeably, but understanding the workflow helps when adjusting your RIP settings.
White ink is the actual ink printed by the DTF printer.
Underbase refers to the white layer positioned beneath the color image.
In a typical DTF workflow:
CMYK artwork → RIP processing → white underbase generation → printing → powder application → curing → heat pressing
CADlink V12 controls the processing that determines how this white layer is generated and screened.
Recommended White Ink Density Settings in V12
There isn’t one universal white ink percentage that works for every DTF printer, ink set, film, and fabric.
Instead, treat the white ink setting as a starting point that needs to be calibrated for your specific production system.
For dark garments, begin with a moderate-to-high white underbase density and evaluate the resulting transfer.
Practical Starting Range
A useful testing approach is to create several versions of the same design using different white densities.
For example:
| Test | White Underbase | What to Evaluate |
|---|---|---|
| A | 70% | Ink usage and opacity |
| B | 80% | General production balance |
| C | 90% | Strong opacity |
| D | 100% | Maximum coverage |
These values should be treated as test points, not universal CADlink presets. Printer manufacturers, ink formulations, RIP configurations, film, powder, curing temperature, and garment fabric can all affect the result.
What Should You Look For?
After pressing each sample, compare:
Opacity:
Does the design maintain strong color on the garment?
Surface feel:
Does the transfer feel unnecessarily thick?
Color vibrancy:
Are reds, blues, greens, and other colors maintaining their intended appearance?
Fine detail:
Are small text and thin lines remaining sharp?
Wash durability:
Does the transfer maintain its appearance after washing?
The best setting is generally the lowest white density that still provides the opacity and color performance you need.
Choke & Spread Settings Explained
Choke and spread are particularly important when printing designs with precise edges.
What Is White Choke?
Choke slightly reduces the white underbase compared with the CMYK artwork.
This prevents white ink from extending beyond the colored image.
For example, imagine printing a red logo on a black shirt.
Without sufficient choke:
CMYK layer:
🔴
White layer:
⚪🔴⚪
The white layer may become visible around the perimeter.
With appropriate choke:
CMYK layer:
🔴
White layer:
⚪🔴⚪
The white layer remains underneath the color rather than forming an obvious outline.
What Is Spread?
Spread works in the opposite direction by extending a layer beyond its original boundary.
In an underbase workflow, careful control of spread can help maintain coverage beneath the CMYK layer.
The exact behavior depends on how the RIP profile and artwork are configured, so avoid assuming that increasing spread will automatically improve every design.
How Much Choke Should You Use?
Start conservatively.
Excessive choke can create the opposite problem: insufficient white coverage near the edges.
This can result in:
- Dark halos
- Weak color edges
- Reduced opacity
- Uneven borders
The ideal choke depends on printer resolution, ink spread, artwork detail, and the physical behavior of your ink and film.
For detailed logos, small typography, and thin lines, smaller adjustments are usually safer than aggressive changes.
Halftone/Screening Options: AM vs FM vs Hybrid
Screening determines how RIP software distributes ink to reproduce different tones and levels of coverage.
This becomes especially important for white ink because excessive solid coverage can increase ink consumption and create a heavier transfer.
AM Screening
AM (Amplitude Modulation) screening varies dot size while maintaining a relatively structured dot pattern.
Potential advantages include:
- Predictable screening
- Smooth tonal transitions
- Consistent reproduction
- Familiar workflow for many print applications
For designs with broad gradients and conventional graphics, AM screening can be a useful starting point.
FM Screening
FM (Frequency Modulation) screening uses smaller dots with varying dot frequency.
It can be useful when reproducing:
- Fine details
- Subtle gradients
- Small graphic elements
- Complex tonal transitions
However, the practical result depends heavily on the printer, resolution, ink, and RIP configuration.
Hybrid Screening
Hybrid approaches combine characteristics of different screening techniques.
They can provide a useful balance between:
- Detail
- Tonal smoothness
- Ink coverage
- Production consistency
Don’t select a screening method simply because one sounds technically superior. Print the same test design using your available screening options and compare the actual transfer.
Testing Your Settings Before a Big Order
The most reliable way to optimize CADlink underbase settings is to build a repeatable test process.
Don’t change five variables simultaneously.
Instead, create a controlled test sheet containing:
- Solid color blocks
- Skin-tone or photographic elements
- Small text
- Thin lines
- Gradients
- Large solid areas
- White-on-color elements
- Fine transparent details
Then create multiple RIP versions.
Step 1: Keep Your Artwork Identical
Use exactly the same artwork for every test.
This ensures that any difference comes from the RIP settings rather than the design.
Step 2: Change One Variable
For example:
Test A: 70% white density
Test B: 80% white density
Test C: 90% white density
Keep everything else unchanged.
Step 3: Print on the Same Film
Different DTF films can behave differently with the same ink configuration.
Use the same film throughout the comparison.
Step 4: Maintain Consistent Curing
Powder application and curing can significantly affect the final transfer.
Keep your curing process consistent across every sample.
Step 5: Press on the Same Fabric
Compare samples using the same garment material and pressing process.
A setting that looks excellent on cotton may behave differently on polyester or blended fabrics.
Step 6: Evaluate After Washing
Don’t judge a setting only immediately after pressing.
Check:
- Color retention
- Cracking
- Peeling
- Edge durability
- Surface feel
- Overall appearance
This turns your test into a production-quality calibration process rather than a visual guess.
Common CADlink V12 Underbase Problems & Fixes
Problem: White outline around the design
Possible cause: Insufficient choke or excessive white expansion.
Try: Reduce the white layer slightly and test a more conservative choke.
Problem: Colors look dull on dark garments
Possible cause: Insufficient white opacity.
Try: Increase white density incrementally and compare the result.
Problem: Transfer feels too thick
Possible cause: Excessive white ink coverage.
Try: Reduce white density while checking that color opacity remains acceptable.
Problem: Fine details disappear
Possible cause: Excessive underbase coverage or unsuitable screening.
Try: Test different screening options and review choke behavior around small elements.
Problem: White layer is visible around text
Possible cause: Underbase extending beyond the CMYK artwork.
Try: Review choke and inspect the design at high magnification before production.
Best Practices for CADlink V12 White Ink Printing
For consistent DTF production, don’t rely on a single “perfect” setting.
Instead:
- Create a baseline profile.
- Calibrate white ink for your specific printer and ink set.
- Test different density levels.
- Use conservative choke adjustments.
- Compare AM, FM, or available hybrid screening options.
- Test both solid graphics and detailed artwork.
- Evaluate transfers after washing.
- Document your successful settings.
- Create separate profiles for significantly different production conditions.
- Avoid changing multiple variables at once.
The biggest mistake is optimizing a setting based only on how the transfer looks immediately after pressing. Production consistency and wash durability matter just as much as initial appearance.
Final Takeaway
The best CADlink V12 white ink underbase settings aren’t necessarily the settings that use the most ink.
Your goal should be to find the balance between opacity, color vibrancy, detail, transfer feel, ink consumption, and durability.
Start with controlled test prints, adjust one parameter at a time, and document the results. Once you identify the settings that consistently work with your printer, ink, film, powder, and garments, save them as part of your production workflow.
Ready to Optimize Your DTF Workflow?
Get CADlink Digital Factory V12 for advanced DTF RIP control, including production workflow, color management, white ink processing, and other tools designed for professional DTF production.
