- Export PNG-24 with transparency at 300 dpi at the final print size
- Convert text to curves and keep strokes ≥ 0.5 mm, negative space ≥ 0.8 mm
- Run preflight in Studio or the RIP and press Fix on what it flags
Format
- PNG-24 with an alpha channel. Not JPG (no transparency), not GIF (256 colours), not PNG-8 unless the design is flat.
- PDF/AI are fine for vector logos — ZoroPrint rasterises them at 300 dpi with a transparent background.
- PSD/TIFF: flatten what you can; hidden layers and layer effects are the usual source of surprises.
Resolution
300 dpi at the size it will be printed. A 1000 px logo is 85 mm wide at 300 dpi — fine for a chest print, blurry across a back. Below 150 dpi ZoroPrint warns you; below 100 the edges visibly stair-step.
Colour
Work in sRGB. Do not convert to CMYK in Photoshop: the RIP does the separation with the printer’s ICC profile, and a file already in CMYK gets converted twice. Pure black (#000000) prints as rich black through the profile — you do not need to build it yourself.
Thin things
- Strokes and text stems at least 0.5 mm (6 px at 300 dpi). Thinner lines lose their white underbase and print grey on dark garments.
- Negative space (gaps inside letters, between lines) at least 0.8 mm, or the powder bridges it.
- Isolated dots and specks smaller than 1 mm: delete them. They peel and look like dirt.
Background
Turn every background layer off before exporting. A “transparent” PNG with a white layer at 1 % opacity prints as a white rectangle. Preflight in ZoroPrint flags this as “opaque background”; Fix removes it.
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