// Print method · Direct to film
DTF Print File Preparation: A Checklist
Direct-to-film (DTF) printing prints the design onto a PET film with colour inks and a white layer. An adhesive powder is added, and the transfer is heat-pressed onto the garment. It works on cotton, polyester and blends.
The file decides how clean the transfer is.
Updated 25 October 2026
File checklist
- Resolution: 300 dpi at print size is the usual target.
- Format: PNG with a transparent background is the standard. Everything that is not transparent is printed, with white ink behind it.
- Transparency: avoid semi-transparent pixels. They can print as solid or patchy areas. Turn soft shadows into halftone dots, or remove them.
- Background: delete any background you do not want printed. A white background in the file prints as a white rectangle.
- Fine detail: very thin lines and tiny separate dots may not transfer well. Ask your printer for their minimum line width.
- Colour: RGB is normal for DTF. The printer software converts it.
Common problems
- A white or coloured rectangle from a background that was not removed.
- Rough edges from a low-resolution file.
- Patchy areas from semi-transparent effects.
What the AOP101 audit checks
Choose "DTG / DTF / Plastisol" as the print method and enter your print size. The audit flags resolution below 150 dpi at that size. It checks the colour mode (RGB passes, CMYK gets a warning) and the real file type. It does not check transparency yet.
Check a DTF file at its real print size. 20 free credits, no card.