Supreme Digital Direct file upload


Supreme Digital · Brooklyn, NY · Est. 2008

Everything you need to prepare your artwork or photography for museum-quality printing. Follow these specifications and your file will be ready to print.

300 DPI minimum
RGB Color space
5 GB Max file size
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Ready to send your file?
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File prepped and ready? Upload now — your file is securely attached to your order at checkout.
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Required Before Upload · All Orders
Your file should meet these specifications before uploading. Files that don't meet our standards may result in print quality issues — we'll contact you before proceeding if we spot a problem, but getting it right upfront saves time for everyone.
✦ 300 DPI minimum ✦ RGB · Adobe 1998 ✦ Sized to final print dimensions TIFF PSD JPG PNG PDF Max 5 GB
01
Before you begin

Core File Requirements

Critical
🎯
Resolution
300 DPI
At your final print dimensions. A file that is 300 DPI at 8×10" will print sharply at 8×10" — not larger. Check resolution in Photoshop under Image → Image Size.
Critical
🎨
Color Space
RGB
Adobe 1998
Adobe RGB (1998) is required for accurate color reproduction on our archival printers. sRGB is acceptable if Adobe 1998 is not available. CMYK files will be converted and may shift.
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File Dimensions
Sized to Print
Set your file dimensions to match your intended print size. If ordering an 18×24" print, your file should be 5400×7200 pixels at 300 DPI. Add a border if you need signing space.
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Accepted Formats
TIFF · PSD
JPG · PNG · PDF
TIFF is preferred for fine art. JPG at maximum quality (12/12) is acceptable for photography. Avoid heavy JPG compression — it creates artifacts visible at print scale.
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File Size Limit
Up to 5 GB
Large, high-resolution files are welcome. TIFF files for large-format prints are often 500 MB–2 GB — this is expected and handled without issue.
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Layers & Edits
Flatten First
Flatten all layers before saving (Layer → Flatten Image in Photoshop). This prevents any adjustment layers, blending modes, or visibility states from rendering unexpectedly.
02
Photoshop / Lightroom workflow

Preparing Your File, Step by Step

1
Set your document to the correct color space
In Photoshop, go to Edit → Convert to Profile and select Adobe RGB (1998) as the destination. This is different from Assign Profile — Convert to Profile actually moves the color data. If your file is in sRGB, converting to Adobe 1998 opens the color gamut for richer print output.
✓ Correct
  • Adobe RGB (1998)
  • ProPhoto RGB (will be converted)
  • sRGB IEC61966-2.1 (acceptable)
✗ Avoid
  • CMYK color modes
  • Lab color mode
  • Missing / untagged profiles
2
Verify resolution and pixel dimensions
Go to Image → Image Size. Make sure Resample is unchecked. Set Resolution to 300 pixels/inch. The document dimensions shown should match your intended print size. If they don't match, resize with Resample checked using Preserve Details 2.0 for the best upsampling quality.
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Quick check formula
Pixel width ÷ 300 = print width in inches. Example: a 5400-pixel-wide image ÷ 300 = 18 inches. Use this to confirm your file is large enough before ordering.
3
Add a border if needed
If your print will be matted or framed, or if you want room to sign the print, add a white border using Image → Canvas Size. A common setup is 0.5" on all sides for a signing margin, or 1" on the bottom for a pencil signature. Let us know your border preference in the order notes.
✓ Common uses
  • 0.5–1" border for signature
  • 2" border for window mat overlap
  • Bleed: no border needed
✗ Watch out
  • Adding border after setting DPI (changes pixel count)
  • Colored borders — use white or black only unless intentional
4
Flatten all layers and save
Before exporting, go to Layer → Flatten Image. Then save using one of the preferred formats below. For maximum quality, save as a 16-bit TIFF with no compression, or as a maximum-quality JPG (Quality 12). Avoid ZIP or LZW compression if your print studio will be doing color management.
Format Best For Quality Notes
.tif / .tiff Fine art, paintings, large editions Best 16-bit, uncompressed preferred. Lossless. Large file size is expected.
.psd Photoshop documents needing review Best Flatten before sending. We can work from layered PSDs on request.
.jpg Photography, quick turnaround Good Save at Quality 12 (maximum). Each save degrades quality slightly — save once from the original.
.png Digital art, illustrations with transparency Good Lossless. Large files. Use when transparency matters.
.pdf Vector art, multi-page documents Good Save as PDF/X-1a or PDF/X-4 at 300 DPI. Embed all fonts.
.bmp / .gif / .webp — Not Accepted These formats are not suitable for fine art printing.
03
When you're ready to order

How to Upload Your File

Step 01
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Choose Your Product
Select Giclee Print, Canvas, C-Print, or UV Printing and configure your size and paper options.
Step 02
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Upload Your File
Click Upload Your Print File on the product page. Drag and drop or browse. Files up to 5 GB are accepted.
Step 03
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Add to Cart & Check Out
Your file is securely attached to your order. Complete checkout — your file travels with your order automatically.
Step 04
✅
We Review & Print
Our team reviews your file before printing. We'll reach out if anything needs attention before we begin.
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Sending a very large file or need a consultation first?
For files over 5 GB, or if you'd like a color proof or consultation before ordering, contact us directly at [email protected] or call (212) 358-8979. You can also book an appointment to bring your file in person to our Brooklyn studio at 3 Knickerbocker Ave.
04
Photoshop step-by-step

Preparing Your File in Detail

A
Setting Resolution to 300 DPI in Photoshop
Image → Image Size

Open your file in Photoshop and go to Image → Image Size (shortcut: Alt+Ctrl+I on Windows, Option+Cmd+I on Mac). This dialog controls both the pixel dimensions and the output resolution of your file.

Understanding Interpolation

The Resample checkbox controls whether Photoshop adds or removes pixels when you change size. This is called interpolation — the process of mathematically inventing new pixel data.

  • Resample OFF: Photoshop redistributes existing pixels. Changing resolution changes print size but not pixel count. No quality loss. Use this first to check if your file is large enough at 300 DPI.
  • Resample ON: Photoshop creates or discards pixels. Use only when you need to change actual pixel dimensions. Always use Preserve Details 2.0 for upsampling — it produces the sharpest result.

Rule of thumb: Never upsample more than 200% of the original size. Beyond that, the invented pixel data becomes visible as softness or artifacts at print scale.

Image Size IMAGE SIZE: 86.5M Fit To: Original Size Width: 18 Inches Height: 24 Inches Resolution: 300 Pixels/Inch ← Set to 300 Resample: Preserve Details 2.0 ✓ Use Preserve Details 2.0 when upsampling Uncheck to change resolution without adding pixels Pixel dimensions at 300 DPI: 18" × 24" = 5400 × 7200 px OK Cancel
Photoshop Image Size dialog — set Resolution to 300 Pixels/Inch with Preserve Details 2.0 selected
☑ Resample OFF — Check size first
Set resolution to 300 without changing pixels. The width/height fields update to show your file's true print size at 300 DPI. If the dimensions are too small, you'll need to upsample or shoot/scan at higher resolution.
e.g. 3000px wide ÷ 300 = 10" print width
☑ Resample ON — Upsample with care
Choose Preserve Details 2.0 from the dropdown. Enter your target print size at 300 DPI. Photoshop invents new pixels using AI-based interpolation. Best results within 150–200% of original size.
e.g. 3000px → 5400px at 300 DPI = 18" print
✗ Avoid: Low quality interpolation
Never use Nearest Neighbor (creates pixelation) or Bilinear for upsampling fine art. Bicubic Smoother is acceptable but Preserve Details 2.0 is superior for print output.
Result: soft edges, visible artifacts, color banding
B
Resizing an Image to Your Print Size
Image → Image Size with Resample ON

Once you know your target print dimensions, resize your file so it is exactly that size at 300 DPI. This ensures no scaling happens during printing — what you set is what gets printed.

  1. Go to Image → Image Size
  2. Make sure Resample is checked
  3. Set the method to Preserve Details 2.0
  4. Confirm Resolution is 300 Pixels/Inch
  5. Enter your print width or height (e.g. 18 inches)
  6. The other dimension updates automatically if the chain link icon is closed (proportional)
  7. Click OK
Proportional vs. Free Transform

The chain link icon between Width and Height in the Image Size dialog locks proportions. Keep it locked unless you intentionally want to stretch the image. If your aspect ratio needs to change, crop first, then resize.

Original File e.g. 3000 × 2000 px Image → Image Size Image Size ☑ Resample Preserve Details 2.0 Resolution: 300 ppi Width: 18 inches Click OK Print-Ready 5400 × 3600 px @ 300 DPI Pixel Dimension Formula Print size (inches) × 300 = pixels needed Common Print Sizes 8×10" → 2400 × 3000 px 11×14" → 3300 × 4200 px 16×20" → 4800 × 6000 px 18×24" → 5400 × 7200 px 24×36" → 7200 × 10800 px Before You Resize 1. Flatten all layers first 2. Save a backup copy 3. Convert to Adobe 1998 4. Do sharpening after resize 5. Never resize a JPEG twice
Workflow: check your pixel math before resizing, and always work from an uncompressed original
C
Adding a Border for Print
Image → Canvas Size

A border adds blank space around your image — useful for signing prints, allowing for window mat overlap, or creating a clean presentation edge. Use Canvas Size (not Image Size) — this adds space without scaling your image.

  1. Go to Image → Canvas Size (shortcut: Alt+Ctrl+C / Option+Cmd+C)
  2. Check "Relative" — this adds the amount you type to the existing canvas
  3. Enter the border width — e.g. 1 inch adds 0.5" on each side
  4. Set Canvas Extension Color to White (or Black for dark prints)
  5. Use the Anchor grid to control where the border is added — center anchor adds evenly on all sides
  6. Click OK
Common border uses
  • Signing margin: 1" border bottom only — uncheck Relative, set anchor to top-center, add 1" height
  • Window mat overlap: 2" border all sides — mat covers the outer 1.5", leaving a clean reveal
  • Presentation edge: 0.5" white border all sides for a clean gallery look
Canvas Size CURRENT SIZE: 86.5M Width: 18 Inches Height: 24 Inches NEW SIZE: Width: 1 Inches Relative ← Check this! Anchor: Center = even border all sides Canvas Extension Color: White OK Cancel BEFORE 18 × 24" +1" border AFTER 0.5" 0.5" 19 × 25" total 0.5" white border all sides
Canvas Size dialog — check Relative, enter 1" to add 0.5" on each side, set anchor to center
✍ Signing Margin
Add 1.5–2" to the bottom only. In Canvas Size, uncheck Relative, click the top-center anchor, then increase the Height by 1.5". The extra white space at the bottom gives room for a pencil signature below the image.
🖼 Window Mat Overlap
Add 2–3" on all sides. The mat window will cover most of the border — the border provides grip for the mat to hold the print. Common for gallery editions and framed work. Specify border size in your order notes.
🎨 Presentation Edge
Add 0.5–1" on all sides for a clean float presentation. The white edge separates the image from the frame or display surface, giving it a refined gallery aesthetic. Particularly effective on dark or densely composed images.