Why vectors suit sublimation

Sublimation transfers dye into polyester, so the print is only as sharp as the file you send to the printer. Vector artwork drawn in Inkscape can be output at any resolution, which means one master file serves a pocket print, a full front and a mug wrap without ever going soft. The output itself is raster — sublimation software wants a high-resolution image or a PDF — but the source stays editable.

Set up the document

Choose inches in File → Document Properties and set the page to the finished print size: a common full-front shirt print is around 11 × 14 in, a standard 11 oz mug wrap about 9 × 4 in. Building at final size keeps line weights and type honest, and lets you judge whether small text will survive.

Color expectations

Screens are RGB and backlit; sublimated polyester is not. Saturated blues, oranges and neons usually print noticeably duller, and true black tends toward charcoal on some blanks. Two habits help: keep an eye on how much of the design depends on exact color, and print a small test on the same blank and paper before a run. Do not chase a perfect on-screen match — build a reference print you trust instead.

Mirroring and bleed

Sublimation prints are pressed face down, so the sheet must be mirrored. Do it at export time on a duplicate — press H in Inkscape to flip horizontally — and never on the master, so the editable file stays readable. For all-over or wrap prints, extend the artwork a quarter inch beyond the trim on every side; for shirts, leave the background transparent unless the blank is white, since sublimation ink cannot print white.

Preparing artwork properly

  • Convert text with Path → Object to Path so fonts are irrelevant to whoever prints it.
  • Avoid very thin strokes and hairline detail; they close up in the transfer.
  • Watch soft gradients across large areas — banding is more visible on fabric than on screen.
  • Check that any traced or imported bitmap is high resolution before you rely on it; see vector versus raster.

Export settings

Open File → Export (Ctrl+Shift+E), choose the page or selection, and export PNG at 300 DPI — the dialog shows the resulting pixel size, which is the number to sanity-check. Keep transparency for designs on colored blanks; flatten onto white only when the printer asks. PDF export is the better choice when your printer's RIP prefers it or when the design is purely vector. Details on both paths are in the export guide.

Reusing designs

Keep one Inkscape SVG master per design and export sized copies per product. If you also cut vinyl or engrave, the same master feeds Cricut cut files and Glowforge jobs with different preparation steps.