What Is DTF Film Delamination?
In Direct-to-Film printing, the clear sheet attached to a transfer is known as the carrier film. Its job is simple: hold the printed ink and adhesive layer in place until the transfer is applied with heat and pressure.
During the pressing process, the carrier film releases while the ink and adhesive permanently bond to the garment.
Occasionally, especially in hot and humid climates like Florida, customers may notice the carrier film separating slightly from the printed transfer. This is commonly referred to as DTF film delamination.
While it may appear concerning at first glance, this behavior is typically temporary and related to environmental conditions, not a defect in the transfer itself.
Why Humidity Can Cause Film Separation
DTF carrier films are made from specialized polyester materials engineered to release cleanly during pressing.
When humidity levels rise, the film layer can absorb small amounts of moisture from the air. As humidity increases, the film can expand slightly while the cured ink and adhesive layer remain stable.
This difference in expansion can create the appearance that the film is separating from the transfer.
In most cases, the transfer itself remains completely usable.
Once heat and pressure are applied, the adhesive activates and bonds permanently to the garment.
The Difference Between Standard Films and OEKO-TEX Certified Films
Many lower-quality transfer films contain chemical stabilizers and plasticizers designed to artificially control how the film behaves in changing environments.
While these additives may reduce visible separation, they often introduce unwanted chemicals into the printing process.
At iHeartCustoms, we intentionally use OEKO-TEX certified DTF consumables, which are tested to meet strict safety and environmental standards.
These materials are designed without harmful toxins, heavy metals, or unnecessary chemical stabilizers.
Because of this cleaner formulation, the carrier film is engineered to release naturally during pressing, rather than relying on chemical additives to control its behavior.
The result is a transfer that prioritizes clean release, garment safety, and long-term durability.
Why the Transfer Still Works Normally
Even if the carrier film shows temporary separation, the printed ink and adhesive layer remain intact.
When the transfer is applied with the proper heat press settings:
• The adhesive activates
• The ink bonds to the fabric
• The carrier film releases cleanly
Once pressed, the transfer performs exactly as intended.
This is why temporary film separation should not be confused with a defective transfer.
Environmental Conditions Matter in DTF Printing
DTF printing systems are designed to operate within controlled environmental conditions.
Most manufacturers recommend production environments around:
• 65–75°F temperature
• 35–60% humidity
Large fluctuations in humidity, especially in coastal or tropical climates, can temporarily affect how films behave before pressing.
This is a normal part of working with professional print materials.
Demonstrating Delamination
In the video accompanying this article, we intentionally forced delamination by scratching and peeling the carrier film to demonstrate how the layers of a DTF transfer work.
This demonstration shows that the clear film is simply a release layer, separate from the printed transfer itself.
Understanding this helps eliminate confusion when customers encounter temporary film separation.
DTF Transfers in Orlando
At iHeartCustoms in Orlando, we specialize in professional Direct-to-Film printing using premium materials including:
• OEKO-TEX certified films
• German-engineered adhesive powders
• Professional DTF production equipment
Our goal is to produce transfers that prioritize print quality, safety, and durability.
Have Questions About DTF Transfers?
If you have questions about DTF film delamination, transfer storage, or pressing techniques, feel free to reach out.
You can text us directly and we will be happy to help clarify any questions about your transfers.
See our BTS video of us pressing a delaminated transfer with successful results!
iHeartCustoms
Orlando, Florida
Custom DTF Transfers | UV DTF Decals | Custom Merchandise