What artwork files do you need for custom packaging?

Papyrn packaging team experience

Many packaging inquiries arrive with a logo screenshot, a Canva link, a product photo, or a visual mockup. That is often enough to understand the brand direction and prepare an initial quote. It is not always enough to create a cutting form, separate print and finishing processes, or produce clear artwork at the final box size.

The opposite problem also occurs: a buyer sends an AI or PDF file and assumes the filename proves it is ready. The file may still use an old dieline, missing fonts, low-resolution linked images, RGB colors, no bleed, several conflicting versions, or finishing artwork mixed into the print layer. A useful prepress check looks inside the file and compares it with the confirmed product specification.

1. Which artwork file format should you use?

Use the format that preserves the information needed for the artwork. Vector files are valuable for logos, small text, line art, cut paths, and finishing masks because they can scale without pixelation. Raster files are appropriate for photographs and pixel-based artwork when their effective resolution is sufficient at final size.

Do not convert a small JPG logo into AI and expect new detail to appear. Placing or tracing a low-quality image inside a vector file does not restore the original curves, type, or resolution. Ask the designer for the original brand asset whenever possible.

2. The confirmed packaging dieline comes before final artwork

A packaging dieline is a flat production drawing showing the panels and structural guides used to make the finished item. It can include cut lines, creases, perforations, glue areas, locks, flaps, and non-printing notes. The exact structure changes with the size, material, board thickness, and manufacturing route.

For an early quote, product dimensions and reference artwork may be enough. For final production, confirm the structure and dieline first. Papyrn's mailer box unfolded-size calculator is a planning tool for size and sheet class, not a production dieline.

3. Bleed, trim, safe area, and folds solve different risks

Bleed extends printed backgrounds beyond the final cut. Trim or cut lines show where the finished edge is intended. A safe area keeps important content away from normal cutting and folding variation. Crease lines show where the material folds, but the visible fold on thick board can occupy more space than a thin line on screen.

Adobe's print guidance explains that bleed allows artwork to extend beyond the page or trim boundary. Packaging adds structural variables, so the printer's dieline and instructions take priority. Ask for the required bleed, safe distance, minimum line size, and fold clearance for the actual product instead of copying one setting from a business card or another box.

4. Fonts and linked images must travel with the file

If a font is unavailable when the file opens, software can substitute another typeface and change line breaks, spacing, or language characters. Outlining converts text into vector shapes and can prevent substitution, but it also makes normal text editing difficult. Keep an editable master, complete proofreading, then follow the supplier's request to outline or legally package the fonts.

Linked photographs, textures, logos, and illustrations can also disappear when only the layout file is sent. Adobe Illustrator's package feature gathers the document, linked graphics, and available fonts for handoff. Embedding images is another option, but the printer should still check effective resolution, color mode, transparency, and crop at final scale.

Do not judge resolution from how large the image looks on a laptop. Effective resolution changes when an image is enlarged in the layout. Send the original high-resolution image and let prepress evaluate it at the final printed size.

5. CMYK, spot colors, paper, and finish affect the printed result

RGB describes light on screens, while common packaging print workflows use process inks, spot inks, or digital device color management. Converting artwork can change bright screen colors. The substrate also matters: white card, coated paper, uncoated kraft, and corrugated materials do not produce the same visual result.

A monitor preview, brand hex code, and paper printout are not equivalent color proofs. When color is important, provide the approved brand reference and agree on the sample or proof method. Even then, acceptable production tolerance and the final material should be discussed rather than promising perfect screen-to-print identity.

6. Foil, spot UV, embossing, and white ink need separate artwork

Special finishing is not simply part of the CMYK picture. Production needs to identify the exact area, process, side, registration expectation, and material limitation. Use clear names and keep each process separate from the normal print artwork.

Minimum text size, line thickness, gap, trapping, registration, and fold clearance depend on the process and equipment. Ask the supplier before reducing a foil logo, UV line, or embossed detail to a size that may not reproduce consistently.

7. QR codes and barcodes require physical-use checks

Supply QR codes and barcodes as suitable vector or high-quality artwork when possible. Keep them away from creases, curved corners, locks, glue areas, heavy texture, reflective foil, and low-contrast backgrounds. Preserve the required clear area and do not stretch the symbol.

Barcode type, encoded data, size, magnification, quiet zone, color, and print quality may be governed by the retailer, marketplace, carrier, or GS1 standard used by the project. A code that scans from a screen mockup is not proof that it will scan after printing, lamination, folding, or warehouse handling. Test the intended printed sample with the relevant devices and workflow before mass production.

8. A practical artwork workflow for small ecommerce brands

Small brands do not need a complete production file before asking for help. Separate the planning stage from the final artwork stage so design time is not spent on an unconfirmed box size or structure.

9. Custom packaging artwork handoff checklist

Use this checklist for mailer boxes, paperboard cartons, printed tissue paper, cards, stickers, and labels, then adjust it to the supplier's product-specific instructions.

10. Common artwork problems that delay a custom packaging order

• Sending only a screenshot of a logo or Canva design.
• Designing before the box size, structure, or material is confirmed.
• Moving or scaling the dieline to fit the artwork.
• Keeping backgrounds exactly on the trim line with no confirmed bleed.
• Placing small text or QR codes across creases, locks, or glue areas.
• Leaving missing fonts or external image links in the file.
• Using RGB screen colors as the only color reference.
• Putting foil, UV, embossing, and print artwork on one unclear layer.
• Sending several files called final without identifying the approved version.
• Approving a flat PDF without checking the folded panel direction.

A prepress correction is not automatically included in the original packaging price. Simple placement checks may be part of normal file review, while logo rebuilding, retouching, language changes, dieline redesign, version creation, and extensive production artwork can require separate design work and approval.

11. External references for artwork preparation

Use software documentation to prepare and package files, then follow the packaging supplier's current dieline and process instructions. For barcodes, use the standard and marketplace requirements that apply to the actual product and destination.