Artwork that looks clean on a laptop can reveal problems at its final print size. Tiny lettering, stray pixels and an unintended background are easier to fix before the file reaches the printer. A brief preflight check saves avoidable revisions.
Work at the intended size
Confirm the design dimensions before export. Review the artwork at that size rather than judging it from a zoomed-in view. Raster artwork must contain enough detail for the requested output; enlarging a small file does not create detail that was never there.
Check the edges and the background
Inspect transparency, stray marks and the outline of the design. A background that blends into the screen may still be part of the file. Review small lettering and fine elements against the intended garment colour, and ask the print provider about its practical limits.
Send a file the provider can use
Follow the provider’s requested format, colour workflow and export settings. Include the final dimensions and any placement notes separately. If colour matching matters, agree on a physical reference and an approval process rather than relying only on a screen preview.
Calculate pixels at the final print size
Resolution matters at the size you will print. Use this relationship: required pixels = width in inches × requested pixels per inch. If the provider requests 300 ppi for a 10-inch-wide design, the artwork needs 3,000 pixels across. A 1,200-pixel image placed at that width contains only 120 ppi. Changing its resolution label to 300 does not add genuine detail.
A practical DTF file preflight
| Check | How to review it |
|---|---|
| Dimensions | Confirm width and height in the order |
| Transparency | Inspect on both light and dark preview backgrounds |
| Edges | Look for a pale halo, stray pixels and rough cutouts |
| Small elements | Review text and fine strokes at final size |
| Colour | Use the provider’s requested workflow and approval reference |
| Revision | Send the agreed export, not an earlier working file |
Handle white artwork deliberately
A white logo can disappear against a white preview background even though it exists in the file. Check it on a contrasting background. Conversely, a white rectangle around a logo may be unwanted image content. Transparency and white ink are different concepts; do not remove intended white elements while cleaning the background.
Colour and orientation: agree with the provider
The fact that a printer uses CMYK inks does not tell you which colour mode the provider wants in the submitted file. Follow its workflow. Likewise, do not mirror an order file automatically: a service may expect normal orientation and handle mirroring in production. Confirm who performs that step.
Frequently asked questions
Is PNG always the best DTF format?
PNG can retain transparency, but accepted formats depend on the provider and artwork. A file extension alone does not establish print quality.
Will a screenshot of a logo work?
Check dimensions, detail and reproduction permission. A screenshot may carry insufficient resolution or unwanted background content.
Can thin text print reliably?
Ask the provider for its minimum detail limits and approve a sample where legibility matters.
Keep the approved export separate from working versions. A clear filename and an agreed print size help prevent the wrong revision from entering production.