1. Why Design Files Matter
Over ninety percent of the final print quality depends on the original artwork. Suppliers generally won’t “fix” substandard files – and even if they can, it adds time and cost. Preparing a compliant file is a simple way to protect your budget and timeline.
2. File Format Requirements by Technique
For digital printing, which includes DTG and DTF, PNG is the preferred format because it supports transparent backgrounds and avoids white edges. JPG is acceptable if it is high‑resolution, and PDF also works well. For screen printing, vector files are the best choice – formats like AI, EPS, or CDR can be scaled infinitely without losing quality, making colour separation easy. Embroidery requires machine‑specific formats such as DST, PES, or EXP. If you don’t have those, supplying a vector AI or PDF will allow our digitiser to convert it smoothly.
If you are unsure which format to send, the safest approach is to provide both a high‑resolution PNG and a vector PDF.
3. Resolution and Dimensions Must Meet Standards
Resolution should be at least 300 DPI (dots per inch). A 72 DPI image downloaded from the web will always print blurry – there is no compromise here. For dimensions, always state the actual print width and height in millimetres or centimetres, not just pixel values. If your artwork extends beyond the allowable print area, clearly indicate which parts are to be printed and which are not.
4. Colour Mode Matters
Digital printing equipment typically processes colours in RGB mode, so DTG and DTF work best with RGB files. Screen printing and embroidery, however, require matching inks or threads, so it is better to provide CMYK values or Pantone numbers for accurate colour matching. Keep in mind that what you see on screen may differ slightly from the final printed result, because fabric colour and texture can affect the appearance. For the most precise colour, we recommend requesting a physical swatch or ordering a test print.
5. Text Must Be Outlined or Rasterised
If your design includes text, you must outline it (convert to curves) or rasterise the text layer in your software. Without this step, if we don’t have your font installed, the system will substitute another font and ruin your layout. If you are submitting a raster format like PNG, the text is already image‑based, so font issues do not apply.
6. Pre‑Submission Checklist – Avoid These Common Mistakes
First, check whether your resolution is below 300 DPI – if so, re‑export it. Second, make sure the background is removed – no white boxes left around your design. Third, verify that the colour mode matches the process requirements; convert if needed. Fourth, confirm that all text has been outlined or rasterised. Fifth, ensure that dimensions are clearly labelled in millimetres or centimetres. Sixth, flatten your layers or save a flattened copy to avoid surprises. Seventh, keep at least five millimetres of safe margin away from the trim edges – don’t let your design elements go too close to the cutting line.
7. Final Advice
If you are unsure about your design files, don’t hesitate to reach out to us in advance. We can pre‑check your files for free before production, flag potential issues, and suggest fixes. It is always best to confirm your artwork before going into production – this saves time, money, and frustration. A clean, properly prepared design file is the key to a smooth customisation project and a final product that exceeds your expectations. Now go check your artwork!
