The Complete Guide to Food Packaging Artwork: File Prep, Color Matching, and Proofing
You’ve designed a beautiful logo, chosen your brand colors, and selected the perfect packaging product. Now comes the step where many packaging orders go wrong: translating your digital design into a physical printed product. Colors that look perfect on your screen print differently on paper. Artwork that’s crisp at 100% zoom becomes blurry when printed on a cup. Files prepared incorrectly delay production by days or weeks.
This guide covers everything you need to know about preparing artwork for food packaging printing — file formats, resolution requirements, color systems, bleed and safe zones, and the proofing process.
File Formats: What to Send Your Manufacturer
Best: Adobe Illustrator (.AI) or PDF with vector graphics. Vector files use mathematical shapes rather than pixels, meaning they can be scaled to any size without losing quality. A logo created as a vector looks identical on a business card, a coffee cup, and a building sign. This is the industry standard for packaging artwork.
Acceptable: High-resolution PDF or EPS. If your designer works in formats other than Illustrator, a high-resolution PDF (300+ DPI, with fonts outlined) or EPS file is acceptable for most printing methods.
Avoid: JPG, PNG, or Word documents. These are pixel-based formats that lose quality when scaled. A logo that looks fine on your website (72 DPI) will print blurry on packaging (which requires 300 DPI minimum). If all you have is a JPG or PNG, your packaging supplier can often recreate it as a vector — but this adds time and may result in slight differences from your original.
Resolution requirement: Minimum 300 DPI at actual print size. For a 12oz cup with a print height of 3 inches, your artwork must be at least 300 DPI at that 3-inch height. Lower resolution results in visible pixelation.
Color Systems: Screen vs Print
This is the single most common source of disappointment in packaging printing. The colors on your computer screen (RGB — Red, Green, Blue, created with light) are physically different from the colors your printer produces (CMYK — Cyan, Magenta, Yellow, Key/Black, created with ink). Some RGB colors — particularly vivid blues, greens, and oranges — simply cannot be reproduced in CMYK printing. They will appear duller or shifted.
CMYK: The standard 4-color printing system. Most full-color packaging printing uses CMYK. Your artwork should be converted to CMYK color space before sending to the manufacturer. If you only send RGB files, the manufacturer will convert them, but the color shift may not match your expectations.
Pantone (PMS): The Pantone Matching System is a standardized color system that ensures exact color consistency across different printers, materials, and production runs. If your brand uses specific colors (and it should), specify them as Pantone numbers. For example, “Starbucks green” is Pantone 3425 C — every printer in the world can reproduce this exact shade. For 1–3 color flexographic printing, specifying Pantone colors is essential.
Practical advice: If your brand has a style guide with Pantone colors, send the Pantone numbers to your packaging supplier. If you don’t have Pantone colors defined, your supplier can help match your closest Pantone shade from a sample or digital file.
Bleed, Safe Zones, and Dielines
Dieline: A dieline is the technical template showing the exact shape and dimensions of your packaging when unfolded flat. For a paper cup, the dieline is a tapered trapezoid shape (because the cup is conical). For a box, it’s a cross-shaped flat layout with fold lines. Your artwork must fit precisely within this dieline. Most manufacturers provide dieline templates — always request one before starting your design.
Bleed: Bleed is the area of your artwork that extends beyond the cut line. It ensures that when the packaging is cut, there are no white edges where the print should meet the edge. Standard bleed is 3mm (0.125 inches) on all sides. If your design has a colored background that runs to the edge of the packaging, extend that background 3mm past the cut line.
Safe zone: The safe zone is the area inside the cut line where critical elements (text, logos, important graphics) should remain to avoid being trimmed off during cutting. Keep all important elements at least 3–5mm inside the cut line. Text placed too close to the edge may be partially cut off.
Printing Methods and Their Artwork Requirements
Flexographic printing (most common for packaging): Works with 1–6 spot colors. Best results come from bold, clean designs with solid colors and clear edges. Fine gradients and photographic images are possible but require experienced press operators. Minimum line thickness: 0.3mm. Minimum font size: 6pt. Each color requires a separate printing plate.
Offset printing: Full CMYK color capability with photographic quality. Handles gradients, shadows, and complex imagery well. Higher setup cost but superior quality for detailed designs. Preferred for premium packaging and large runs.
Digital printing: No plates needed — prints directly from digital files. Ideal for small runs, variable data (different names or numbers on each piece), and testing designs before committing to a large flexo run. Quality is excellent but per-unit cost is higher than flexo at large volumes.
Screen printing (for plastic cups/containers): Works with 1–4 colors. Sharp, durable prints that resist fading and scratching. Simple, bold designs work best. Limited ability to reproduce fine details or gradients.
The Proofing Process
Never approve production without reviewing a proof. The proofing process typically follows these steps:
1. Digital mockup: The manufacturer creates a digital rendering showing how your design will look on the actual packaging shape. This is free at most suppliers and takes 24–48 hours. Review for layout, text accuracy, and overall appearance — but understand that screen colors will differ from print colors.
2. Color proof (for Pantone colors): A printed color sample on the actual substrate material showing the exact ink shade. Essential if color accuracy is critical. Takes 3–5 days and may cost $50–$100.
3. Pre-production sample: An actual physical sample produced on the same printing equipment that will handle the full production run. The most accurate preview of the final product. Takes 5–10 days and costs $100–$300 depending on the product. This cost is typically deducted from the production order.
At minimum, always approve a digital mockup before production. For large or high-value orders, invest in a physical pre-production sample — it’s cheap insurance against a $5,000+ production run that doesn’t meet your expectations.
Common Artwork Mistakes to Avoid
Using RGB instead of CMYK or Pantone colors. Sending low-resolution files (under 300 DPI). Placing text too close to the cut line (gets trimmed). Not accounting for the curve of cups and containers (flat artwork wraps differently on 3D shapes). Using fonts without outlining them (fonts may not be available on the manufacturer’s system, causing substitution). Not including bleed in the artwork file. Assuming the proof matches the final print exactly (always allow for minor variation between proof and production).
Need help with your packaging artwork? GQ TH Pack provides free artwork support. Send us your logo in any format — AI, PDF, PNG, or even a napkin sketch — and our design team creates a print-ready mockup within 24 hours at no charge. Send us your design and we’ll take it from there.