PET film is the foundation of every DTF transfer, and not all films are created equal. The film you choose affects ink adhesion, color vibrancy, powder bonding, peel characteristics, and ultimately the quality of the finished transfer.
Hot Peel vs Cold Peel
Hot Peel Film
- Peel temperature: Remove film while still warm (immediately after pressing)
- Finish: Slightly glossy, vibrant colors
- Speed: Faster production — no waiting for cool-down
- Best for: High-volume production, designs without fine detail
- Drawback: Can stretch or distort if peeled too quickly or at wrong angle
Cold Peel Film
- Peel temperature: Wait until transfer cools to room temperature before peeling
- Finish: Matte, softer appearance
- Speed: Slower — requires 30-60 second cool-down per press
- Best for: Fine detail work, text-heavy designs, premium quality jobs
- Drawback: Lower throughput due to cool-down time
Warm Peel Film
- Peel temperature: Remove when warm but not hot (10-15 seconds after pressing)
- Finish: Semi-matte, balanced appearance
- Speed: Moderate — compromise between hot and cold
- Best for: General purpose, good balance of quality and speed
Film Coating Types
Single-Side Coated
Standard DTF film with coating on one side (the print side). The coated surface accepts ink and prevents bleeding. Most common and most economical.
Double-Side Coated
Coated on both sides — useful if you occasionally load film wrong-side-up (it works either way). More expensive and rarely necessary for experienced operators.
Matte Coated
Produces a non-reflective, matte finish on transfers. Preferred for fashion and retail applications where a glossy sheen is undesirable.
Glossy Coated
Produces brighter, more vibrant colors with a slight sheen. Popular for promotional products and sports apparel.
Film Weight (Thickness)
- 60 micron: Thin, economical. Good for standard transfers but more prone to curling
- 75 micron: The sweet spot. Most popular thickness, good rigidity and print quality
- 100 micron: Heavy, rigid. Excellent for large format and automated feeding but costs more
Quality Indicators
When evaluating film quality, look for:
- Consistent coating — Hold film up to light; coating should be uniform with no thin spots
- Flat lay — Film should lay flat without excessive curling
- Ink absorption — Ink should stay on the surface without bleeding or feathering
- Powder adhesion — Powder should stick uniformly to printed areas and shake off clean areas
- Clean release — Film should peel away cleanly without leaving residue or pulling ink
Storage and Handling
- Store film in its original packaging away from direct sunlight
- Keep in a temperature-controlled environment (65-80°F)
- Handle with clean, dry hands — oils and moisture affect coating performance
- Use film within 12 months of purchase for best results
- Allow cold-stored film to acclimate to room temperature before printing