When you're ready to get custom apparel screen printed, showing up with vague ideas and blurry photos won't cut it—printers need specific files and clear direction to deliver quality results. Providing the right design files upfront saves time, avoids costly reprints, and ensures your finished shirts, hoodies, or hats match your vision. Here's exactly what screen printers expect from you before they can quote your job.
File Format and Resolution Requirements
Screen printers work almost exclusively with vector files—Adobe Illustrator (.ai), EPS, or PDF format. Vector graphics scale infinitely without pixelation, which is critical when your design needs to fit a 2-inch pocket logo and a 12-inch back graphic on the same order.
If you only have a raster image (JPG, PNG, or PSD), printers can often convert it, but quality suffers significantly. A 72 DPI photo won't become crisp vector art through conversion alone. Ask your printer upfront if conversion is possible; some charge $50–$150 for this service.
For best results, provide artwork at 300 DPI minimum if it's raster-based, and ensure your file is sized to match your intended print area. A printer needs to see the actual dimensions you're targeting—not a guess.
Color Specifications
Screen printing uses a different color model than your monitor. While digital design uses RGB (red, green, blue), screen printing relies on Pantone Spot Colors or CMYK separations. This matters because what looks vibrant neon pink on your screen may print as muted coral on fabric.
Specify colors using:
- Pantone Spot Color numbers (e.g., Pantone 186 C for red)
- CMYK values if Pantone isn't available
- A physical Pantone fan deck held up to your actual fabric choice to confirm
If you want photorealistic color gradients or photographs, that requires 4-color process printing (CMYK), which costs more than spot color work but handles unlimited colors. Discuss this trade-off with your printer upfront.
Artwork Specifications and Placement
Provide a mockup showing exactly where the design sits on each garment. Screen printers need to know:
- Design dimensions in inches (not pixels)
- Distance from seams, necklines, and edges
- Which color shirt you're printing on (dark navy requires different ink opacity than white)
- Sleeve print locations if applicable
Most printers prefer designs at least 0.5 inches from seams and 1 inch from collar/cuff edges. Back prints typically run 10–14 inches wide; chest prints, 4–8 inches. These are standard ranges, but confirm with your specific printer.
Number of Colors and Separations
Each color in screen printing requires a separate screen and setup, which affects cost. A single-color design on white shirts might run $3–$6 per unit for a 50-piece order; a six-color design could jump to $8–$15 per unit.
Before finalizing your design, ask: "How many colors is this, and what's the cost difference if I reduce it to 3?" Printers can provide color separation previews showing exactly which colors will print where.
Garment and Ink Type Decisions
Confirm your printer's capabilities:
- Water-based inks: Softer hand feel, eco-friendly, work better on light fabrics
- Plastisol inks: More durable, vibrant on darks, slightly stiffer feel
- Discharge inks: Create vintage, soft finishes on 100% cotton (premium cost)
Different garment blends (100% cotton vs. polyester blends vs. tri-blends) affect ink adhesion and final appearance. If you're printing on specialty items—hoodies, towels, or mesh—mention this upfront so the printer selects appropriate screens and ink.
Final Checklist Before Submitting
- Files in vector format (.AI, .EPS, or .PDF)
- Design dimensions and placement clearly labeled
- Color specifications via Pantone numbers
- Garment type and color specified
- Quantity for the order
- Reference image or mockup showing placement on the garment
Frequently Asked Questions
Q: Can I submit my design as a JPG or PNG? Most screen printers can work with raster files, but you'll get sharper results and potentially pay less if you provide vector art. If you only have raster files, ask upfront about conversion costs and quality expectations.
Q: How much does it cost to add a second color to my design? Expect an additional $1–$4 per garment per color added, depending on your order size and the printer's pricing model. Larger orders and simpler designs typically see better per-unit costs.
Q: What's the typical turnaround time for a screen printing order? Most shops complete orders within 5–10 business days after design approval, though rush orders (2–3 days) usually cost 25–50% more. Confirm deadlines with your printer immediately.
Use Mercoly to compare multiple screen printers in your area, review their design requirements and pricing, and find the right partner for your custom apparel needs.