How to Prepare Artwork for T-Shirt Printing

If you want your custom shirts to look sharp, professional, and exactly how you envisioned them, artwork preparation matters more than most people realize. We have seen great designs turn into average prints simply because the file setup was not correct. On the other hand, even simple artwork can look incredible when it is prepared properly for production.

At RKT Shirts, we handle custom screen printing and embroidery for businesses, schools, nonprofits, teams, and events across North Carolina and nationwide. Every qualifying order includes an artwork review and up to one hour of design time, because we know how critical this step is. Still, the better your file is prepared from the start, the smoother and faster your project moves from proof to production.

In this guide, we are breaking down exactly how to prepare artwork for t-shirt printing, from file types and color setup to sizing and common mistakes. Whether you are submitting your first design or managing apparel for a growing brand, this will help you avoid delays and get the best possible print results.

Understanding the Difference Between Vector and Raster Artwork

One of the most important concepts in t-shirt printing is the difference between vector and raster files. The type of file you submit directly affects print quality.

Vector artwork is created using paths and mathematical formulas rather than pixels. Common vector file types include AI, EPS, and editable PDF files. These files can be resized infinitely without losing quality. For screen printing, vector files are ideal because they allow us to separate colors cleanly and produce crisp edges on press.

Raster artwork, on the other hand, is made up of pixels. File types like JPG, PNG, and TIFF are raster-based. Raster images can work for t-shirt printing, but only if they are high resolution. If a raster file is low resolution and you try to enlarge it, it becomes blurry or pixelated. That pixelation will show up in your print.

If you are unsure which type of file you have, open it and zoom in closely. If the edges remain smooth and sharp no matter how much you zoom, it is likely vector. If the edges start to look blocky or fuzzy, it is raster.

Whenever possible, send original editable vector files. This gives us the most flexibility and ensures the cleanest possible print.

Setting Up Your File at the Correct Resolution

Resolution is critical when working with raster artwork. For t-shirt printing, we recommend at least 300 DPI at the final print size. DPI stands for dots per inch and determines how much detail your image contains.

Here is where many people go wrong. They create a small design at 72 DPI, then enlarge it later. Increasing the size does not add detail. It simply stretches the pixels, which leads to blurry prints.

Instead, design your artwork at the size you want it printed and set the resolution to 300 DPI from the beginning. If your design will be 10 inches wide on the shirt, build it at 10 inches wide and 300 DPI.

For logos pulled from websites or social media, the file is often too low resolution for print. These images were created for screens, not garments. In those cases, the artwork may need to be recreated in vector format to ensure quality results.

Converting Text to Outlines Before Submission

Fonts can cause unexpected problems if they are not handled correctly. If you send a file that uses a font we do not have installed, the software will substitute a different font automatically. This can completely change the look of your design.

To avoid this issue, convert all text to outlines before submitting your file. In Adobe Illustrator, this is done by selecting the text and choosing “Create Outlines.” This turns the text into shapes rather than editable font characters.

Once text is outlined, it will appear exactly as designed, regardless of which fonts are installed on another computer. It also ensures proper color separation during the screen printing process.

If you are unsure how to outline fonts, our artwork review process can help identify and fix this before production.

Using the Correct Color Mode for Screen Printing

Screen printing is based on spot colors, not blended RGB color like you see on a screen. Understanding this difference is key to achieving accurate color results.

Most digital artwork is created in RGB color mode, which is designed for screens. For printing, especially screen printing, we work in spot colors or sometimes CMYK depending on the project. Spot colors are individual, solid ink colors. Each color requires its own screen during production.

If your design uses subtle gradients, shadows, or complex color blends, that can increase the number of screens required. More colors mean more setup and more complexity.

When preparing artwork for screen printing, use solid spot colors whenever possible. If exact color matching is important for your brand, Pantone color matching is available for a small per-ink fee. Providing Pantone color codes in your file helps ensure consistency across multiple orders.

If you are not sure how your design will translate from RGB to ink, it is better to ask before approving the proof. What looks bright and glowing on a screen may print slightly differently on fabric.

Designing With the Garment Color in Mind

A common oversight is forgetting that the shirt color becomes part of the design. If you are printing on black shirts, any black elements in your artwork will disappear unless they are outlined or separated properly.

When preparing your file, always specify the garment color and make sure the artwork contrasts well against it. Light ink colors show up best on dark garments, and darker inks show up best on light garments.

For dark shirts, some designs require an underbase, which is a layer of white ink printed underneath the colors to make them pop. This is especially important for bright colors on dark fabric. Your artwork should be set up cleanly so the underbase can be applied accurately without unwanted gaps or overlaps.

Preview your design on the actual shirt color before submission. This simple step can prevent a lot of last-minute revisions.

Keeping Line Thickness and Detail Print-Friendly

Not every design that looks good on a computer screen will print well on fabric. T-shirt printing involves ink being pushed through a mesh screen onto fabric. Extremely thin lines and tiny details can fill in or break down during printing.

As a general rule, avoid lines thinner than 1 point in vector artwork, especially for smaller designs. Small text should be sized appropriately so it remains legible once printed. Script fonts with very thin strokes can be challenging and may require adjustments.

If your design includes intricate details, consider slightly thickening lines or simplifying elements. This ensures durability and clarity after washing and wear.

We always review artwork before production, but starting with print-friendly design principles saves time and reduces the need for revisions.

Sizing and Placement Considerations

Another key part of preparing artwork is understanding how it will be placed on the garment. A design that looks balanced on a computer screen may feel too small or too large once printed.

For adult standard front prints, a common width range is 9 to 12 inches, depending on the design. Youth shirts require smaller sizing. Left chest prints are typically around 3 to 4 inches wide. Back prints can be larger and more impactful.

When submitting artwork, specify your intended print location and approximate size. If you leave it open-ended, we will recommend sizing based on industry standards and your garment selection.

Remember that proportions matter. A tall vertical design might need to be adjusted so it does not sit too low on the shirt. A wide horizontal design should be centered and scaled appropriately to avoid wrapping too far toward the sides.

Seeing a digital proof before production is your opportunity to confirm that sizing and placement meet your expectations.

Avoiding Transparency and Special Effects

Drop shadows, glow effects, gradients, and transparency can create problems in screen printing if not prepared properly. These effects often rely on blending modes that do not translate cleanly to spot color printing.

If your design includes these elements, flatten the artwork appropriately and confirm how many colors will be required to reproduce the effect. Some gradient effects may need to be converted into halftones, which simulate shading using small dots.

When in doubt, simplify the design. Bold, clean artwork typically produces the strongest and most durable prints.

Submitting Your Artwork the Right Way

When you are ready to send your file, include as much information as possible. This helps us move your project forward quickly and accurately.

Provide the original editable file, not just a screenshot or mockup. Include details such as garment color, print location, preferred ink colors, and desired sizing. If you have brand guidelines or Pantone references, attach them.

After you request a quote and approve the artwork proof, production typically takes 7 to 10 business days once the invoice is approved and the 50 percent deposit is received. Keep shipping transit time in mind if you need your order by a specific date.

Being organized on the front end helps prevent delays and ensures your shirts are in hand when you need them.

Final Thoughts on Preparing Artwork for T-Shirt Printing

Great custom apparel starts with great preparation. Understanding file types, resolution, color setup, and print limitations will dramatically improve your results. It also helps avoid unnecessary revisions and production delays.

From our experience working with clients across North Carolina and nationwide, the most successful projects begin with clear communication and properly prepared artwork. Even if you are not a professional designer, taking the time to follow these guidelines makes a noticeable difference in the final product.

If you are unsure about your file, send it over for review. It is always better to check before production than to fix a problem after printing. When your artwork is dialed in, your finished shirts will look sharp, feel professional, and represent your brand exactly the way you intended.