Preparing Artwork for T Shirt Printing: File Specs by Method
Prepare print-ready artwork for apparel: vector vs raster, DPI, color mode and a method matrix for screen, DTF, embroidery, sublimation and HTV.
Method by method file matrix and a six step print-ready prep process for shops and customers.
Preparing artwork for t shirt printing means matching the file to the decoration method: clean vector or outlined art for spot color screen printing and cut vinyl, high resolution raster (commonly about 300 pixels per inch at the final print size) on a transparent background for DTF and DTG, and a digitized stitch file for embroidery, with print size and garment color confirmed before production.
Print-ready rule: a file is print ready when it is the right type for the method, built at or near final size, uses the color setup the decorator asks for, has fonts outlined or embedded, and has been approved on a proof.
Part of the business and pricing guides in the DAX Learning Hub: practical guides for running a decorating shop. Clean files cut remakes and art time, which feeds into How to Price Custom Apparel and Setup, Rush and Minimum Fees. For how art moves into production, see Job Tickets and Shop Floor Flow.
Preparing Artwork for T Shirt Printing: What Print-Ready Means
Print ready does not mean one file type. It means the decorator can produce the job without rebuilding the art. A logo that is fine for DTF may still need vector rebuilding for screen separations, and a sharp vector logo still needs digitizing before it can be embroidered. Asking for the right file up front is cheaper than fixing it after the quote.
Artwork Requirements by Decoration Method
| Method | Preferred file | Resolution and size | Watch for |
|---|---|---|---|
| Screen printing (spot color) | Vector (PDF, SVG, EPS) with spot colors defined | Vector scales freely; raster art for simulated process is commonly asked at about 300 ppi at final size | Gradients and photos need halftones or simulated process separations; fine lines and tiny text |
| DTF transfers | High resolution PNG on a transparent background, or vector | Commonly about 300 ppi at final print size | Semi-transparent pixels, soft shadows and feathered edges; very thin lines and small gaps |
| DTG | High resolution raster or vector | Commonly about 300 ppi at final print size | Unwanted background boxes; garment color showing through light areas |
| Embroidery | Clean vector or high resolution art for the digitizer, then a digitized stitch file (for example DST) | Size set at digitizing; resizing a stitch file much is risky | Small text and fine detail that will not stitch cleanly |
| Sublimation | High resolution raster or vector | Commonly about 300 ppi at final size | Prints only on light, polyester-rich surfaces; no white ink |
| Heat transfer vinyl (cut) | Vector cut path (SVG, PDF, EPS) | Vector | Very thin parts that are hard to weed; mirror at cut per vinyl instructions |
Ranges reflect common decorator and transfer supplier file specs. Each shop and supplier sets its own minimums; check their written spec.
Vector vs Raster for Apparel
Vector art is built from paths, so it scales to any size without losing edges. It is the cleanest start for logos, type and flat color designs, and it is required for cut vinyl. Raster art is built from pixels, so quality depends on resolution at the final printed size. Enlarging a small image does not add detail; a 1,200 pixel wide image is about 300 ppi at 4 inches but only about 100 ppi at 12 inches.
How to Prepare Print-Ready Artwork Step by Step
- Confirm the method and garment color. The method decides the file type; the garment color decides whether white or an underbase is needed.
- Choose vector or high resolution raster. Vector for spot color screen, cut vinyl and embroidery source art; raster at about 300 ppi at final size for photo DTF, DTG and sublimation.
- Set size and color. Build at or near final print size. Use spot colors for screen printing; use the color mode your decorator or transfer supplier asks for.
- Outline or embed fonts and flatten effects as needed. Convert text to outlines in vector files; remove or flatten effects the method cannot reproduce.
- Export with a proof. Export the production file plus a proof showing size, placement and colors for customer approval.
- Name the file clearly. Include customer, job, location and version so the right file reaches production.
Color Modes, Spot Colors and Separations
Screen printing works one ink per screen, so spot color art with defined colors is the simplest path; full color art moves into halftones, simulated process or CMYK separations made by the shop. See Simulated Process vs Spot Color. Digital methods print from RGB or CMYK files, and suppliers differ on which mode they want, so ask instead of guessing. Exact color matches are not guaranteed on screen or in print, so approve critical colors on a sample.
Fonts, Effects and Common File Problems
- Missing fonts: outline text in vector files or send the font license and file per your shop policy.
- Background boxes: a white background in a raster file usually prints as a white rectangle on DTF and DTG.
- Semi-transparent effects: soft shadows and fades can print differently on DTF than they look on screen.
- Hairlines and tiny text: lines that are too thin may not print, hold adhesive or stitch cleanly. Ask your supplier for its minimum line width.
- Low resolution web images and screenshots: request the original file or quote art cleanup.
What to Ask the Customer Before You Quote
- What method, garment and garment color is this for, and how many locations?
- Do you have the original vector or full resolution file?
- What final print size and placement do you want?
- Are any colors brand-critical and do you have color references?
- Who approves the proof, and by when?
For transfer layouts, see DTF Gang Sheets. For method basics, see Screen Printing for Beginners, DTF Printing for Beginners and Embroidery Digitizing Explained.
Frequently Asked Questions About Artwork File Prep for Apparel (FAQ)
What file type works for t shirt printing?
It depends on the method. Vector files (PDF, SVG, EPS) are the cleanest start for logos, screen printing and cut vinyl. High resolution PNG on a transparent background is common for DTF and DTG. Embroidery needs a digitized stitch file made from clean source art.
What does print ready artwork mean?
It means the decorator can produce the job without rebuilding the file: the right type for the method, built at or near final size, the requested color setup, outlined or embedded fonts, and an approved proof.
Do I need a vector file for screen printing?
For spot color logos and type, vector art is the cleanest and most common request. Photos and gradients can be screen printed through halftones or simulated process, often from high resolution raster art, with the shop making the separations.
What DPI do I need for DTF or DTG?
A common target is about 300 pixels per inch at the final print size. Check the resolution at the size you will print, not the file's original size, and confirm your supplier's minimum.
Can I print a low resolution logo?
It may print soft or jagged. Ask for the original file first; otherwise quote art cleanup or a vector rebuild before production.
File specs in this guide are common starting points, not universal rules. Figures vary by method, equipment and supplier; check the supplier spec before production.
Seeing how different decoration methods handle the same artwork makes file specs easier to explain to customers. Browse more guides in the DAX Learning Hub, and check cities and dates on the DAX show schedule when you are ready to compare decoration workflows with suppliers in person.