Direct-to-Film (DTF) printing has emerged as one of the fastest-growing techniques in recent years, with its low cost, rapid production speed and vibrant colour reproduction standing out as its most compelling advantages.However, some users find that after production: the pattern appears excellent immediately after transfer, but after several washes the colours fade or even bleed.
Many people attribute this problem to the ink, but in reality—most fading cases are not due to the ink itself, but rather to insufficient curing of the hot melt powder or incorrect hot-pressing conditions.
To help you easily troubleshoot the problem, this article will explain the causes of fading from five aspects and provide immediately applicable solutions.
1. What are the signs of fading after washing?
You may encounter the following issues:
– Printed patterns become lighter in color
– Light-colored garments experience dye transfer
– Edges become unstable with slight peeling
– Patterns lose vibrancy, developing a hazy or matte finish
These seemingly “poor colorfastness” problems often stem from causes other than the ink itself.
2. The Real Cause: The Hot Melt Powder Was Not Fully Cured
The wash resistance of DTF prints depends on the bonding strength between “ink + hot-melt powder + heat pressing.”
If you notice easy color loss, it’s likely due to:
● Powder not fully melted
During the curing stage, the powder must melt into a smooth, glossy layer.
If it remains grainy or matte, adhesion will be weak, leading to fading or peeling later.
● Insufficient heat press temperature or duration
Heat pressing is what finalizes the bonding to the fabric.
If the time, temperature, or pressure is too low, the powder cannot anchor the design securely.
Over 90% of fading issues are caused by insufficient curing—not low-quality ink.
3. Solutions for Preventing Fading in DTF Printed Designs — The Correct Application of Hot-Melt Powder
The curing and heat-press stages are the most critical parts of the DTF workflow because they determine how well the hot melt powder bonds with both the ink layer and the fabric. Even if high-quality materials are used, incorrect temperature, time, or pressure will weaken the bond and result in fading, peeling, cracking, or a rough texture after washing.
A properly cured print should feel smooth, flexible, and slightly glossy after peeling the film. If the surface feels sandy, rubbery, dull, or powdery, it’s a clear sign of under-curing. Conversely, overheated prints may feel stiff and even cause discoloration or shrinking on heat-sensitive fabrics.
To achieve the best and most consistent printing results, we recommend the following settings:
Powder Melting Stage (Curing)
135°C – 150°C
3 – 5 minutes
Look for a smooth, glossy surface — this visual cue indicates proper melting and activation of the adhesive layer.
Heat Pressing Stage
165°C – 170°C
90 – 120 seconds
Apply medium, even pressure
These parameters help ensure thorough bonding between the hot melt powder and ink, preserving vibrant colors even after repeated washing.
4. Hot melt powder selection is equally critical: Prioritize particle sizes of 80–120μm
Many users overlook the quality of the hot melt powder itself, yet it directly impacts pattern durability and handfeel.
Recommended selection:
Heat-transfer powder with particle size approximately 80–120 μm
Too large particle size: Difficult to melt completely
Too small particle size: Excessively thick powder layer compromises softness and may cause unevenness
Additionally, testing an alternative heat-transfer powder for comparison is highly recommended. This simplifies identifying the root cause of any issues.
5. Seeking more consistent print quality? Choosing a reliable powder supplier is key
If you’re seeking consistently high-quality, stable hot melt powder, consider products from specialized manufacturers.
For example, Winnerjet is one of the industry’s well-regarded hot melt powder producers, offering consistent powder quality compatible with various DTF printing workflows.
Using premium hot melt powder combined with optimal melting and heat pressing parameters effortlessly enhances color fastness, ensuring your designs remain vibrant and fade-resistant wash after wash.
Final Thoughts
Direct-to-Fibre printing is a powerful and versatile technology, yet achieving durable, flawless results hinges critically on proper curing processes and suitable materials. Before attributing issues solely to the ink, first scrutinise curing conditions and powder performance. In most instances, subtle adjustments alone can significantly resolve process-related concerns!
FAQ.
Is a higher hot-pressing temperature always better?
No.
Excessive temperature can damage clothing, severely alter patterns, and even discolor.
165–170°C is a stable recommended range based on extensive testing; it allows for rapid filling without damaging the material.
How can I tell if the hot melt powder has completely melted?
Observe the powder surface:
Completely melted: Uniform, glossy, and smooth surface
Unmelted: Surface appears grainy, whitish, or hazy
Why do the edges of my pattern curl up after washing?
Common causes include: insufficient powder coverage of the edges, inadequate powder melting, insufficient hot pressing pressure, and excessively short hot pressing time.
Does the particle size of hot melt powder really affect fading?
Yes.
Particle size affects melting rate, flowability, and final strength.Recommended: 80–120 μm particle size hot melt powder.This is the optimal range for most DTF processes.
How do I choose a reliable hot melt powder brand?
You can consider the following criteria: whether the powder particle size is stable and whether it is smooth and transparent after melting.
In the industry, Winnerjet is a trusted hot melt powder supplier for many manufacturers, offering excellent stability and compatibility, making it a top choice.
