Raster vs Vector: Essential Printing Guide to Image File Formats

Every packaging designer and print-ready file submission eventually comes down to one question: raster or vector? Understanding the difference isn’t just technical — it directly affects whether your logo stays sharp on a small hang tag, a large shipper box, or a billboard-sized display.

Here’s a practical breakdown of what sets these two image types apart, which file formats belong to each, and how to prepare your artwork for the best possible print results.

What Are Raster Images?

A raster image is built from a grid of tiny colored squares called pixels. Like a mosaic, the image is made up of a fixed number of pixels, measured in dots per inch (DPI) or pixels per inch (PPI). The more pixels per inch, the higher the image quality — and the larger the file size.

The key limitation of raster images is that they are non-scalable. Enlarging a raster image beyond its original resolution causes visible degradation — the image looks blurry or pixelated. This is why the resolution you choose matters so much at the beginning of the design process.

• 300 DPI is the standard resolution for print production — packaging, labels, boxes, and printed materials
• 72 DPI is standard for website images and on-screen display — not suitable for print

Photographs and scanned images are the most common examples of raster images. Raster files are edited in programs like Adobe Photoshop, Corel PaintShop Pro, GIMP, or Pixlr.

Raster File Formats

• TIFF (.tiff): Lossless compression — large file size, high quality; widely used in professional print production. Supports transparent backgrounds.
• JPG (.jpg): Compressed with some quality loss (lossy compression); smaller file size. Best for photographs and complex images. Does not support transparent backgrounds. Most common format for web images.
• PNG (.png): Lossless format with larger file sizes than JPG. Supports transparency. Better suited for web graphics than print due to typically lower DPI settings.
• BMP (.bmp): Uncompressed, high-quality format originally developed by Microsoft. Good for archiving but creates very large files.
• GIF (.gif): Supports animation and transparency but limited to 256 colors — not suitable for photographs or high-quality print.
• HEIC (.heic): Apple’s format for iPhone images; uses about half the storage of JPG. Windows has developed extensions for converting HEIC to JPG.

What Are Vector Images?

Vector images are defined by mathematical paths, shapes, and curves rather than pixels. Because these files aren’t pixel-based, they can be scaled up to any size — from a business card to a billboard — without any loss of quality. The phrase “raster is faster, but vector is corrector” captures the practical distinction well.

Logos, illustrations, icons, and type-based graphics are the most common use cases for vector images. Their file sizes are typically small because they consist of lines and anchor points rather than pixel grids, making them fast to share and easy to work with across design teams.

Vector files are created and edited in programs like Adobe Illustrator, CorelDRAW, Affinity Designer, or Inkscape.

Vector File Formats

• PDF (.pdf): The most widely used format for printing — portable, retains formatting across programs, and can contain either vector or raster elements depending on the source software. Can be encrypted with passwords and digital signatures.
• EPS (.eps): Preserves resolution when scaled; long-used for logos, icons, and illustrations. Created by Adobe in the 1980s for consistent quality in large-format printing. Less common now but still accepted by many printers.
• AI (.ai): Adobe Illustrator’s native format — requires Illustrator to open fully (CorelDRAW offers limited support). Supports transparency and special effects. Preferred by packaging print partners for artwork submitted in editable form.
• CDR (.cdr): CorelDRAW’s native format — similar use case to AI but within CorelDRAW’s ecosystem.
• SVG (.svg): Small file sizes, primarily used on the web for graphs, diagrams, and icons. Also used in cutting workflows for die-cut and vinyl applications.

Raster vs. Vector: Direct Comparison

How to Prepare Your Artwork for Packaging Print

1. Know Your Printer’s Requirements

Most packaging printers require a vector file — typically PDF, AI, or EPS. Confirm the specific format your printer accepts and whether the file should include layers, cut lines, and fold lines (dielines). Submitting the wrong format is one of the most common causes of production delays.

2. Check Your Colors

Colors look different on screen than they do in print. Consumers form their initial impression of a product in around 90 seconds, and color influences up to 90% of that impression — so color accuracy matters.

• Files for print are typically set in CMYK (cyan, magenta, yellow, key/black) color mode
• Website and digital images use RGB (red, green, blue)
• Confirm with your printer whether they can match specific Pantone colors
• Note that Kraft paper carries darker colors well, but not all printers can print white ink on Kraft

3. Get Print-Ready Files from Your Designer

If you’re working with a designer, confirm your printer’s file format requirements before the final handoff. A print-ready file includes dielines, color codes for custom colors, correct bleed margins, and any special layer or structural information your printer needs.

4. Verify Your Material Choice

The printing technique must be compatible with the material. Certain finishes, coatings, and inks work on specific substrates and not others. Confirm material compatibility with your packaging partner before finalizing specs — especially for specialty papers, kraft, or coated boards.

5. Request a Physical Sample

Before mass production, always request a physical sample. A sample lets you check color accuracy, print sharpness, material feel, fold quality, and structural integrity under real-world conditions. What looks correct on screen can reveal issues in print that only a physical review will catch.

Evaluating Your Packaging Visuals: Questions to Ask

Once you have a prototype, use these questions to assess whether the visuals are ready for production:

1. Is it immediately clear what the product is and who it’s for?
2. Are photos and descriptions an accurate representation of the contents?
3. How does the packaging look on a shelf or in an eCommerce listing next to competitors?
4. Is the design flexible enough to accommodate product variants without a complete redesign?

EdgeCraft Packaging provides artwork setup guidance, dieline templates, and print-ready file review for every order. If you’re working on packaging design, contact us to connect with our design team — or review our artwork guidelines before submitting files for production.