Artwork & File Guidelines for Sign Printing
Prepare print-ready files for professional signage — or let us handle the design for you.
Understanding Digital Printing
Digital printing transfers files directly from computer to substrate through advanced inkjet or laser technology — no plates, no lengthy setup. This cuts cost and turnaround for runs under 1,000 units compared to traditional offset lithography.
The technology excels at variable data printing, letting each piece contain unique information. From personalized mailers to one-off event banners, digital printing delivers professional output at every scale.
Don't Have Print-Ready Artwork?
Most customers start with just an idea, sketch, or description — that's perfectly fine. We ask the right questions to understand your vision and create artwork that works for signage.
In-House Design
- ✓ Full design from scratch
- ✓ Logo vectorization
- ✓ Complete branding packages
- ✓ Layout adaptation for different sizes
Larger projects: Design often included free, up to 3 revisions
Smaller projects: $30/hour for design work
Partner Design Network
Need specialized work beyond signage? We partner with designers across the US, Mexico, Europe, and Africa for logo creation, illustration, branding, and complex graphics.
Not sure what you need? Contact us — we'll figure out the best path forward.
Choosing the Right File Format
Vector formats (.AI, .EPS) are preferred for logos, text, and graphics — they use math instead of pixels, scaling from a business card to a building wrap with zero quality loss.
PDF/X-4 is excellent for layouts combining vector and raster. We also accept packaged InDesign files, .PSD, high-res JPEG, PNG, and TIFF.
Why Vector Files Are Preferred
Signs can be 10 feet wide or more. A file that looks sharp on your phone will appear blurry when enlarged for print. Vector files (.AI, .EPS, .SVG) are resolution-independent and solve this entirely.
If you only have raster files (JPG, PNG), send the highest-resolution version. We can work with high-res raster but can't add quality that isn't there.
Format Comparison
Converting Text to Outlines
Fonts on your computer are instructions your system interprets live. Transfer the file to another machine and missing fonts trigger substitution — often with disastrous results.
Converting text to outlines transforms each character into a vector shape — anchor points and curves that any system renders identically. Also called "converting to paths" or "converting to curves."
Typography Best Practices
- ●Save first: Keep an editable version before outlining. Once converted, text can't be edited.
- ●Minimum size: 6pt for close-viewing materials like business cards.
- ●Distance formula: 1 inch letter height per 10 feet viewing distance. 100 ft = 10-inch characters.
- ●Typeface: Sans-serif (Helvetica, Futura, Gotham) outperforms serifs in large format — clearer at distance.
Vector vs. Raster Graphics
Understanding these two graphic types prevents countless production headaches.
Vector Graphics PREFERRED
Stored as mathematical equations — points, lines, and curves recalculated at any size.
- ✓ Infinite scalability
- ✓ Tiny file sizes
- ✓ Fully editable
- ✓ Razor-sharp at any size
- ○ Can't represent photos
- ○ Complex art increases processing
Raster Graphics
A grid of pixels — total pixel count determines resolution and max print size.
- ✓ Photographic complexity
- ✓ Pixel-level editing
- ✓ Complex color gradations
- ✓ Universal compatibility
- ○ Enlargement causes pixelation
- ○ Large files at high res
Color Models for Printing
CMYK (Cyan, Magenta, Yellow, Key/Black) is the backbone of commercial printing — inks combine through subtractive mixing, absorbing wavelengths and reflecting others.
RGB (Red, Green, Blue) drives screens through additive mixing. RGB's gamut exceeds CMYK — vivid blues and greens on screen often fall outside printable range.
Color Terminology
- CMYK
- Process colors for print. "K" = Key (black).
- RGB
- Additive model for screens. Must convert to CMYK for print.
- PMS (Pantone)
- Premixed spot inks for exact color matching across vendors.
- ICC Profile
- Device-specific data for accurate color interpretation.
Color Management Guidelines
- →Total ink: Keep combined CMYK under 300% to avoid drying issues and smearing.
- →Rich black: C:30 M:30 Y:30 K:100 for deep black. Pure K:100 looks washed out.
- →Color shift: Budget 10–15% variance screen-to-print. Request proofs for critical work.
- →Substrate: White maximizes vibrancy. Clear/colored materials need white underbase.
Bleed Specifications
Cutting machines can't trim perfectly. Without bleed, minor shifting leaves white edges. Any element reaching the document edge must extend beyond the trim line into the bleed zone.
Key Terms
- Bleed Area
- Extension beyond trim. 0.125″ (3mm) small format; 0.5–1″ large signage.
- Trim Line
- Intended final dimension. Cutting targets this line.
- Safe Zone
- Interior margin for critical content. 0.125–0.25″ inside trim.
- Slug Area
- Space outside bleed for printer marks. Removed in final trim.
Image Resolution
Resolution depends on viewing distance. Human eyes can't distinguish pixels beyond certain distances, so matching resolution to context optimizes file size without sacrificing perceived quality.
Resolution by Viewing Distance
| Distance | Min DPI | Optimal | Applications |
|---|---|---|---|
| Under 2 ft | 300 | 450 | Business cards, brochures, labels |
| 2–4 ft | 200 | 300 | Posters, trade show graphics, menus |
| 4–8 ft | 100 | 150 | Banners, window graphics, murals |
| 8+ ft | 50 | 100 | Building wraps, billboards, vehicles |
⚠ About AI-Generated Images
AI generators (Midjourney, DALL-E, ChatGPT) output ~1024×1024 pixels — far too small for signage:
- • A 4-foot sign at 150 DPI needs ~7,200 pixels wide
- • A 1024px AI image prints at only ~7 inches at 150 DPI
- • Enlarging causes severe pixelation and blur
We can recreate AI concepts as proper print-ready artwork.
Note: DPI specs refer to final output size. A 300 DPI image at 4×6″ becomes 150 DPI at 8×12″. Always calculate at intended print dimensions.
Shape-Cut Signs & Contour Cutting
Shape-cut production creates custom silhouettes, die-cut decals, and contour displays. Your cut path must be a clean vector on its own layer, in a distinct color separated from print artwork.
Cut File Requirements
- 01Spot color: Name it "CutContour" or "DieLine" — production software recognizes these.
- 02Stroke: 0.25pt or hairline. Thick strokes create ambiguity.
- 03Closed paths: Every cut path must be a complete closed shape.
- 04Registration marks: Required for multi-layer applications.
- 05Safety margin: Min 0.125″ (3mm) between artwork and cut lines.
For vinyl decals needing weeding, include a color-coded reference showing areas to remove vs. preserve.
How to Submit Your Files
Once ready, send files via our upload portal (over 25MB) or email for smaller files.
? File Upload Portal
Secure upload up to 2GB. Best for large artwork and multiple files.
Upload Files →✉️ Email
Files under 25MB. Great for quick questions or simple projects.
contact@sign20.com →Not sure if your file works? Just send it — we review every file at no charge.
Pre-Flight Checklist
Review before submitting — catching issues early saves time and money.
File Setup
- CMYK color mode
- Resolution for viewing distance
- Fonts outlined or embedded
- Linked images at correct res
- Ink coverage under 300%
Layout
- Bleed extends required distance
- Critical elements in safe zone
- Cut lines on dedicated layer
- Dimensions match ordered size
- Spell-check before outlining
Frequently Asked Questions
Vector formats like .AI and .EPS are preferred — they scale to any size. For photos, use high-res TIFF or PNG at 150–300 DPI.
We recreate logos as scalable vectors through vectorization — works for any size from cards to building wraps.
AI generators output ~1024×1024 pixels — too small for signage. A 4-foot sign needs ~7,200 pixels wide. We can recreate AI concepts as print-ready artwork.
Yes — larger projects often include design free with up to 3 revisions. Smaller projects: $30/hour.
Depends on distance: 8+ feet needs 50–100 DPI, 2–4 feet needs 200–300 DPI. Farther = lower resolution needed.
Just send it — we review every file at no charge. Upload here or email contact@sign20.com.
