Getting the Best Results from Your Custom Printz
Quick Start: What You Need
| Setting | Recommended | Minimum |
|---|---|---|
| Resolution | 300 DPI | 150 DPI |
| File Format | PNG | JPG, PDF, SVG |
| Colour Mode | RGB | RGB |
| Background | Transparent (PNG) | — |
1. Image Resolution — How Sharp Will My Print Be?
DPI means “Dots Per Inch.” More dots = sharper print. Think of it like a TV screen — 4K looks sharper than an old TV because it packs in more pixels. Same idea with your artwork.
300 DPI — Best quality. Razor-sharp text, smooth gradients, fine details preserved.
150 DPI — Acceptable minimum. May look slightly soft up close. Fine for bold, simple designs.
Below 150 DPI — Not recommended. You’ll see the pixels (“blocky” look). Our system will warn you during upload.
How to check:
Windows: Right-click → Properties → Details tab
Mac: Open in Preview → Tools → Show Inspector
Photoshop: Image → Image Size
2. File Formats — What Can I Upload?
PNG (Our Favourite)
✅ Supports transparency (no background)
✅ Keeps full quality
✅ Best for logos, text, and illustrations
JPG / JPEG
✅ Smaller file sizes
⚠️ No transparency (adds white background)
⚠️ Loses quality each time it’s saved
PDF
✅ Great for vector artwork
✅ Keeps fonts and layers intact
⚠️ Make sure fonts are outlined
SVG
✅ Vector format — scales to any size
✅ Perfect for logos and text
✅ Tiny file size
Not Accepted: BMP, TIFF, GIF, PSD — convert to PNG or PDF first.
3. Colour Settings — Will My Colours Look Right?
Our DTF printers work in RGB. If your file is CMYK, we’ll convert it — but colours may shift slightly.
Your screen lies a little — every monitor shows colours differently. The final print may be slightly warmer or cooler.
Very dark colours blend — pure black printz great, but very dark navy and dark brown can look almost identical on fabric.
Neon doesn’t exist on fabric — electric green, hot pink, neon blue will print as the closest “real” shade. Still looks good, just not glow-in-the-dark bright.
Pantone Matching: Got a brand colour that must be exact? Drop your Pantone code in the order notes.
4. Design Dimensions — How Big Can I Print?
Think of the print area like a picture frame on your shirt. You drag and resize your design on the canvas — the system measures it automatically and sets the price tier based on how big your design is.
Print Size Tiers
| Tier | Fits Within | Like… |
|---|---|---|
| Spot (~A7) | Up to 10cm | Business card |
| Mid (~A5) | Up to 20cm | Postcard |
| Standard (~A4) | Up to 35cm | A4 page |
| Maxi (~A3) | Over 35cm | A3 page |
Which measurement counts? Whichever side is bigger — width or height. A design 8cm wide but 25cm tall? That’s Mid (25cm is the biggest side).
How pricing works: You design, you resize. The system measures and shows you the tier. If it’s over budget, just shrink the design — the tier drops automatically.
Front AND back? Each side is a separate print charge. Both sleeves = 2 charges.
Print Zones (where you can place designs)
| Zone | Max Area |
|---|---|
| Front Full | 35cm × 42cm |
| Back Full | 35cm × 42cm |
| Front Chest | 10cm × 10cm |
| Left Sleeve | 8cm × 3cm |
| Right Sleeve | 8cm × 3cm |
Pixel Sizes for Best Quality (300 DPI)
| Print Size | Upload At Least |
|---|---|
| Spot (10cm) | 1181 × 1181 px |
| Mid (20cm) | 2362 × 2362 px |
| Standard (35cm) | 4134 × 4134 px |
| Full zone (35×42cm) | 4134 × 4961 px |
Safe Zone: Keep important parts (text, faces, logos) at least 0.5cm from the edge.
5. Vector Graphics — The Gold Standard
Pixel images (photos, JPGs, PNGs) are like mosaics — made of tiny coloured squares. Zoom in and you see the squares. Make it bigger and it gets blurry.
Vector images are like instructions — “draw a circle here, a line there.” Zoom in forever and it stays perfectly sharp.
Why vectors give better printz:
• Infinitely scalable — no blur at any size
• Cleaner edges — text and logos print razor-sharp
• Smaller files — a vector logo might be 50KB vs 5MB pixel version
• Easy colour changes
| Format | Extension | Best For |
|---|---|---|
| SVG | .svg | Web + our design tool |
| Print-ready artwork | ||
| EPS | .eps | Professional design files |
| AI | .ai | Adobe Illustrator source |
We accept: SVG and PDF directly in our design tool.
Have AI or EPS? Export as SVG or PDF first.
How do I know if my file is vector?
• Zoom to 500% — edges stay sharp? Vector.
• File under 1MB for a logo? Likely vector.
• Made in Illustrator, Inkscape, or CorelDRAW? Likely vector.
• Photos are NEVER vector.
Don’t have a vector?
Simple logos/text — we may be able to convert it (just ask).
Complex artwork/photos — use highest res pixel file (300 DPI min).
Free tool: Inkscape can trace simple designs.
Quick rule:
Logo or text? → Vector (SVG/PDF)
Photo or painting? → PNG at 300 DPI
Not sure? → Email us, we’ll check it free.
6. Transparency & Backgrounds
No background? Save as PNG with transparent background. The shirt colour shows through.
Full-coverage printz? JPG is fine for designs covering the entire print area.
Dark shirts: We print a white base layer under your design. Your colours go on top. Transparent areas = no white layer = shirt fabric shows through.
7. Text & Fonts — Will My Text Print Clearly?
The golden rule: If you can’t read it on your phone screen at arm’s length, it won’t print well on a shirt.
Fabric isn’t paper. Ink bleeds slightly into the weave, so thin lines and tiny text lose definition. Go bolder than you think you need.
| Type | Minimum | Recommended |
|---|---|---|
| Headlines | 14pt | 18pt+ |
| Body text | 8pt | 12pt+ |
| Fine print | 6pt (absolute min) | Avoid if possible |
Bold beats thin — chunky fonts look great on fabric. Thin scripts can disappear.
Outline your text — convert to “curves” or “outlines” before saving.
Sans-serif is safer — Arial, Montserrat, Bebas print more reliably than decorative fonts.
Minimum line weight: 2pt. Hair-thin lines (under 1pt) will vanish on fabric.
8. The CRISP Check — Is Your Artwork Print-Ready?
Before you upload, run your design through our 5-point CRISP check. Think of it like a preflight checklist — green means go, amber means caution, red means fix it first.
🟢 SHARP — Is It Crisp?
Zoom in at full size. Sharp and clear? You’re good. Fuzzy or pixelated? You need a higher-resolution file.
Fix: Upload at least 150 DPI, ideally 300 DPI.
🟢 CLEAN — Are the Edges Tidy?
Look at the outline of your design. Clean and defined? Or white box, halo, or pixelated fog around it?
Fix: Save as PNG with true transparency.
🟢 CLEAR — Can You Read It at a Glance?
Hold your design at arm’s length. Can you immediately tell what it is? If you squint, simplify it.
Fix: Make the main element stand out.
🟢 BOLD — Will Thin Lines Survive?
If it looks thin on screen, it’ll be invisible on a shirt. Fabric isn’t paper.
Fix: Lines at least 2pt. Text above 8pt (12pt+ recommended).
🟢 PRINT-SAFE — Will the Colours Work?
Screens show colours that printers can’t reproduce. Neon on screen prints as a duller (but nice) shade.
Fix: Avoid pure neon colours. Use our colour palette in the design tool.
| Badge | Meaning |
|---|---|
| 🟢 CRISP-Ready | All 5 pass — upload and go |
| 🟡 Needs Attention | 1+ warnings — could be better |
| 🔴 Not Print-Ready | 1+ failures — fix before ordering |
9. Common Issues & Quick Fixes
| Problem | Fix |
|---|---|
| “Low resolution” warning | Use a larger source file or recreate at 300 DPI |
| Design looks pixelated | Don’t upscale — find or create a bigger original |
| Colours different on screen vs print | Normal — request a sample for critical colours |
| White box around design | Re-save as PNG with transparent background |
| Text is blurry | Convert to curves/outlines, or use vector (SVG) |
| Thin lines missing | Thicken to 2pt minimum (CRISP Rule: BOLD) |
| Neon colours look dull | Use printable colour range (CRISP Rule: PRINT-SAFE) |
10. Preparing Your File — Step by Step
- Get your image at 300 DPI (or use a vector SVG/PDF)
- Check the size — does it match the print area? (See Section 4)
- Run the CRISP check — sharp, clean, clear, bold, print-safe?
- Convert to RGB colour mode
- Outline all text (convert to curves)
- Remove the background or save as PNG with transparency
- Save as PNG (pixel art) or SVG/PDF (vector art)
- Upload to our design tool
- Preview the mockup — check on light and dark shirt colours
- Order when you’re happy 🎉
Need Help?
Our design tool shows a live preview of exactly how your print will look. If you’re not sure about your artwork:
- 📧 Email your file: contact@customprintz.shop
- ✅ We’ll check it and let you know if anything needs fixing
- 🆓 Free artwork review for orders over $100
Happy creating!
CustomPrintz.shop