Blog › Artwork to Print-Ready Packaging File

How to Turn Artwork into a Print-Ready Packaging File

By Nguyễn Thành Dân, Founder of Drint · 28/10/2026 · Updated 30/10/2026

What does "print-ready packaging file" mean?

It is a file a printer can run without asking for changes. For packaging that normally includes:

• Artwork placed on the right dieline at the right size
• Bleed beyond the cut line
• Colours in the printer's colour space (usually CMYK) with any spot colours named
• Fonts embedded or converted to outlines, images at sufficient resolution
• A PDF in a print standard such as PDF/X-4
• The dieline as a separate, clearly named layer or file with cut and crease lines distinguished

Requirements differ between printers: ask for their bleed size, colour profile, and overprint and varnish layer rules.

What are the steps?

How do I get the right dieline?

Pick the structure by its standard code (FEFCO for corrugated board, ECMA for folding cartons) and enter the exact dimensions. Drint lets you generate the dieline at the size you specify and export it as PDF, AI or SVG, and as DXF or CF2 for die-makers. From a chat assistant, the Drint MCP server can also generate the dieline; see the connection guide.

State clearly whether your numbers are inside or outside dimensions, and tell your printer the board type and thickness.

What bleed and safe margin should I use?

Common practice is a few millimetres of bleed and a similar safe margin inside the cut. Typical values vary by printer and process. Ask your printer for their numbers. Keep text and logos away from folds and glue flaps.

How do I handle colour?

Packaging is usually printed in CMYK, sometimes with spot colours such as brand colours, metallic inks or varnish. Convert RGB artwork to CMYK before export and check how saturated screen colours shift. If brand colour accuracy matters, ask the printer whether to use a spot ink instead of a CMYK mix. Drint's Pro plan exports CMYK PDF/X-4 through ICC profiles, with an ink limit, bleed and separations, and puts the die line on its own layer.

What is PDF/X-4?

PDF/X-4 is a PDF/X print-exchange standard. It aims to make the PDF predictable at the printer: fonts embedded, colour defined, and, unlike earlier X standards, it allows live transparency. Many printers ask for PDF/X-4 or PDF/X-1a; ask which yours prefers.

What does preflight check?

Preflight scans the file for problems before export. In Drint, preflight reports problems per face as errors, warnings or notes. Its checks include:

• Image resolution (below 290 dpi is a warning, below 150 dpi an error)
• Objects outside the die that will not print
• Objects cut by the cut line or lying on a fold
• Distance to the cut and fold lines
• Text too small to read
• Rich black text that prints on four plates
• Thin lines that may drop out
• Foil, emboss and spot UV below their minimum sizes
• Barcodes below 80% of GS1 size or too light
• QR codes under 15 mm
• White objects on paper where white does not print

Treat errors as blockers and read warnings. A low-resolution image on a front panel is a warning you should not ignore.

How should the dieline and artwork travel together?

Send the printer:

1. The artwork PDF/X-4
2. The dieline in a vector format (AI, SVG, DXF; CF2 for some die-makers)
3. A note with dimensions, board, finishes (foil, emboss, spot UV) and quantities

When you send a project to a print shop on Drint, the shop receives the project file, a die PDF for each product and a picture. If you work with multiple designs on one sheet, imposition arranges them for the press.

How do I check finishes?

Foil, embossing and spot UV need separate layers or files marked as spot colours. Name them clearly, set them to overprint where required, and confirm with the printer. Do not guess; each press shop has its own conventions.

Final checklist

• Structure and dimensions confirmed, inside vs outside stated
• Dieline generated for that size
• Artwork covers bleed, text clear of folds
• All colours CMYK or named spot
• Fonts embedded or outlined
• Images at the printer's required resolution
• Preflight clean
• PDF/X-4 exported
• Dieline file included and layers labelled
• Finishes labelled
• Printer has approved a proof

What happens when the printer rejects the file?

Rejections usually fall into a few groups. Fix the cause rather than re-exporting blindly.

How do I keep versions straight?

Name files with the project, dieline code, dimensions and a version number, for example serum-carton_ecma-a20-20-03-01_40x40x110_v3.pdf. Send only the final version and a short note listing what changed since the last proof. Keep the dieline file and artwork file paired so nobody prints on an old structure.

Should I print a proof?

Yes, for any new structure or colour-critical job. A white dummy folded from the real dieline confirms fit; a printed proof confirms colour. Both cost less than a rejected production run.

Next step

Generate a dieline at your size from the structure codes, place your artwork and run preflight. Unsure which box to use? Read FEFCO 0201 vs 0427. To start from an AI assistant, follow the MCP connection guide.

Sources

• Ghent Workgroup, Ghent PDF Output specifications, accessed 30 October 2026.
• ISO 15930-7, Graphic technology — Prepress digital data exchange using PDF — Part 7: PDF/X-4.
• Fogra, colour characterisation data (FOGRA39, FOGRA51), accessed 30 October 2026.
• International Color Consortium, ICC profiles, accessed 30 October 2026.

Frequently asked questions