Printing a digital photo sounds straightforward until the print arrives and looks nothing like what you saw on screen. Colors are off. The image is soft. Or there’s a white border you didn’t want.
Getting accurate, sharp prints requires understanding a small number of concepts that most photography guides gloss over. This is the complete reference—from image preparation to choosing where to print.
Resolution and the DPI Myth
DPI (dots per inch) in a digital image is metadata—a number stored in the file that tells printing software how large to render the image on paper. It has no effect on what you see on screen, and changing it without resampling doesn’t change image quality.
What actually determines print quality is pixel count—the total number of pixels in the file.
For high-quality photo printing, you need 300 PPI at the final print size. PPI (pixels per inch) is the meaningful measurement: how many pixels exist per inch in the printed output.
| Print Size | Minimum Pixels at 300 PPI |
|---|---|
| 4" × 6" | 1200 × 1800 px (2.2 MP) |
| 5" × 7" | 1500 × 2100 px (3.2 MP) |
| 8" × 10" | 2400 × 3000 px (7.2 MP) |
| 11" × 14" | 3300 × 4200 px (13.9 MP) |
| 16" × 20" | 4800 × 6000 px (28.8 MP) |
| 20" × 30" | 6000 × 9000 px (54 MP) |
A 12MP smartphone photo (4032 × 3024 pixels) can produce a sharp 13" × 10" print at 300 PPI. A 45MP full-frame camera file can produce a sharp 24" × 16" print with room to spare.
For large format prints (24" and above) viewed at normal viewing distances (3+ feet), you can print at 150–200 PPI—the eye can’t resolve the detail at distance. Canvas prints specifically can go as low as 100–150 PPI due to the texture’s diffusion effect.
Preparing Your File for Printing
Color profile. Most consumer and professional photo labs accept sRGB files. Submit in sRGB unless the lab specifically requests Adobe RGB or provides a custom ICC profile for their printers. Submitting Adobe RGB to a lab that expects sRGB produces washed-out colors.
If you edit in Adobe RGB, convert to sRGB in Photoshop (Edit > Convert to Profile > sRGB IEC61966-2.1) or in Lightroom at export (Color Space: sRGB) before sending to the lab.
Format. JPEG at quality 90–100% is standard and accepted by all labs. TIFF is also accepted by most professional labs and avoids any JPEG compression—use it for very large prints or fine art work. PNG is rarely supported for print orders.
Sharpening. Images viewed at normal screen distance look correct with modest sharpening. At print distance, images often need slightly more edge sharpening to appear crisp. Apply “output sharpening for print” at medium strength in Lightroom’s export dialog, or use a dedicated output sharpening step in Photoshop. Don’t apply both—double-sharpening produces halo artifacts.
File naming. Many online labs use file names to match prints to orders. Use descriptive names without special characters.
Monitor Calibration and Soft Proofing
The most common reason prints don’t match the screen is that the screen is displaying colors inaccurately—typically too bright and too saturated relative to what ink can reproduce.
Calibrate your monitor. Hardware calibrators (Calibrite ColorChecker Display, X-Rite i1Display) measure your screen and create a custom ICC profile that corrects for its specific output. Without calibration, there’s no reliable relationship between what you see and what prints.
Use the correct screen brightness. Most uncalibrated monitors are set too bright (300–500 nits) for print work. Calibrate to 80–100 nits for print editing.
Soft proof in Photoshop or Lightroom. Using the lab’s printer ICC profile, soft proofing shows you on screen how the image will look in print—specifically where colors will shift, where highlights will clip, and where saturation will be reduced by the printer’s gamut limitations.
Labs’ printer ICC profiles are available for download from most professional labs’ websites. Download the profile for your specific paper choice and load it in Photoshop (View > Proof Colors, select the lab profile) before making final adjustments.
Home Printing vs Photo Lab
Home printing (inkjet printers like the Canon PIXMA Pro series, Epson SureColor, or Epson Expression Photo) gives you full control and immediate output. The trade-offs:
- Quality can equal or exceed labs for large prints if the printer is calibrated and you use the right paper
- Cost per print is high for occasional use: ink cartridges are expensive relative to print yield
- Paper choices are flexible—matte, glossy, fine art, canvas
- Wide-format home printers (13"+ width) are expensive ($200–$2,000+)
- You bear the learning curve: color management, paper profiles, head cleaning
Online labs (Mpix, Nations Photo Lab, Bay Photo, WhiteWall for premium) offer high quality at low cost for medium volumes:
- Professional lab printers produce consistent, calibrated output
- Much lower cost per print than home inkjet for standard print sizes
- Turnaround is 2–5 business days plus shipping
- Color accuracy depends on your monitor calibration and submitting the right color profile
- Reduced control over very specific color choices
Local same-day labs (Walgreens Photo, CVS, Costco Photo Center): convenient and fast, lower price point, quality ranges from acceptable to inconsistent depending on location and printer maintenance. Fine for everyday prints; not for archival or professional work.
Paper Types and Their Effects
Glossy: High reflectivity, vivid colors, deep blacks. Fingerprint-prone; requires careful handling. Best for portraits, product shots, and images meant to look vivid.
Matte: No reflectivity, subdued look, easier to view under varied lighting, more resistant to fingerprints. Blacks aren’t as deep as glossy. Preferred for fine art, landscapes, documentary.
Luster/Satin/Semi-gloss: A middle ground—some sheen, less prone to fingerprints than glossy, good color depth. Most professional portrait and event photographers default to luster.
Fine art / Baryta: Heavyweight papers that produce high-quality, archival prints with excellent tonal range. Used for fine art gallery work. Baryta papers have a glossy finish with a distinctive look.
Canvas: Texture masks fine detail, lower required resolution, gallery-wrap possible. Warmer look than photographic paper.
Long-Term Archival
Prints fade. How fast depends on ink type, paper type, and storage conditions.
Professional prints using pigment inks on archival paper, stored away from direct light, can last 100+ years without significant fading. Consumer inkjet prints with dye inks in direct sunlight may show fading in 5–10 years.
For prints you want to last: choose labs or printers that specify “pigment ink,” use archival paper, frame under UV-protective glass, and hang away from direct sunlight.
Store unframed prints flat in acid-free sleeves or boxes.
Before printing, make sure your image is the right pixel dimensions for your desired print size. Use the free Image Resizer to resize to exact print dimensions.