Custom T-Shirt Design Glossary: DTG, Screen Print, Vinyl, and More
A comprehensive glossary of custom t-shirt printing terminology — DTG, screen printing, vinyl, sublimation, file formats, fabric, and finishing terms.
Core Printing and Decoration Methods
Choosing the right production path is the first step in any custom apparel printing methods file formats guide. Each method has specific requirements for artwork and fabric.
Direct-to-Garment (DTG)
A digital printing method that functions much like a high-end office inkjet printer but for fabric. The printer applies specialized aqueous inks directly onto the fibers of the garment. Ideal for complex, multi-colored designs and photographic images because it does not require individual screens for each color. Best suited for 100% cotton garments and a favorite for small batches or one-off "print on demand" orders. When following a DTG workflow, ensuring high print quality starts with high-resolution raster files.
Screen Printing
The traditional gold standard of the apparel industry, also known as silk screening. This process involves creating a stencil (or "screen") for each color in a design and then using a squeegee to push thick plastisol or water-based ink through the mesh onto the fabric. While it has higher setup costs due to the screen creation process, it is the most cost-effective method for bulk orders and produces extremely durable, vibrant results. Screen printing typically requires vector files to ensure clean color separation.
Heat Transfer Vinyl (HTV)
A polyurethane or PVC material that is cut into specific shapes or letters using a plotter or vinyl cutter. The excess material is removed (a process called "weeding"), and the remaining design is applied to the garment using a heat press. Vinyl is highly durable and produces crisp, opaque results. It is commonly used for simple graphics, such as names and numbers on sports jerseys.
Dye Sublimation
A process where heat-sensitive ink is turned into a gas under high heat and pressure, allowing it to bond directly with the polyester fibers of a garment. Because the ink becomes part of the fabric rather than sitting on top, the print has "zero hand feel" and will never crack or peel. This method only works on white or very light-colored synthetic fabrics with high polyester content.
Embroidery
The art of decorating fabric using a needle and thread to create a raised, textured design. In modern custom apparel, this is done using industrial machines that read "digitized" files to stitch complex logos and text. Embroidery is often chosen for hats, jackets, and corporate polos to provide a professional, high-end look.
Plastisol Transfer
A hybrid method where a design is screen printed onto a special heat-sensitive release paper rather than directly onto the shirt. These "cold peel" or "hot peel" transfers can be stored and heat-pressed onto garments later. This allows for the high quality of screen printing with the flexibility of on-demand application.
Direct-to-Film (DTF)
A newer technology where a design is printed onto a special clear film and then covered with a hot-melt adhesive powder. The film is then heat-pressed onto the garment. DTF is gaining popularity because it works on almost any fabric type (cotton, polyester, or blends) and produces vibrant, durable prints that are thinner and more flexible than traditional heat transfers.
Digital Design and File Preparation
To ensure the best results, you must understand how file formats impact the final look of your custom t-shirt design. Proper file prep is the difference between a blurry mess and a retail-ready garment.
Vector Graphic
An image created using mathematical paths (points, lines, and curves) rather than pixels. Vector files can be scaled to any size without losing quality or becoming "pixelated." For custom printing, vector files are highly preferred, especially for screen printing and vinyl cutting. Common vector file extensions include .AI, .EPS, and .SVG. Using Adobe Express is an excellent way to start with clean templates that maintain professional standards.
Raster Image
An image composed of a grid of individual pixels. Unlike vectors, raster images have a fixed resolution; if you try to enlarge them beyond their original size, they will look blurry or jagged. Photographs are always raster images. Common raster extensions include .PNG, .JPG, and .TIFF.
DPI (Dots Per Inch)
A measure of spatial printing or video dot density, specifically the number of individual dots that can be placed in a line within the span of 1 inch. For t-shirt printing, your design files should generally be created at 300 DPI at the actual print size to ensure a crisp, professional result.
Bleed
The area of a design that extends beyond the final trim or print line. In some printing processes, like all-over printing, providing a bleed ensures that if the fabric shifts slightly during the process, there won't be an unprinted white gap at the edges.
Safe Area
The designated area within a design layout where all critical elements (like text and logos) should stay. Staying within the safe area ensures that important parts of your design aren't cut off or lost in seams, collars, or the edges of the print bed.
CMYK
Short for Cyan, Magenta, Yellow, and Key (Black). This is the color model used for physical printing. In contrast, computer screens use RGB (Red, Green, Blue). Because the color range of ink is different from the color range of light on a screen, it is often helpful to convert your designs to CMYK to see a more accurate representation of how the colors will look when printed.
Transparency
A feature in digital files (specifically .PNG or .SVG) that allows the background of an image to be "invisible." When designing a shirt, transparency is crucial because it tells the printer only to apply ink where the artwork is, rather than printing a big white or colored box around your logo.
Mockup
A digital representation of how a design will look on a physical garment. Mockups help designers and customers visualize the scale, placement, and color interaction of the artwork before the printing process begins.
Fabric and Garment Terminology
A glossary isn't complete without understanding the canvas itself. The fabric determines how the ink sits and how the garment wears.
Ring-Spun Cotton
A type of cotton created by continuously spinning and twisting the cotton strands to make them very fine, strong, and soft. Ring-spun cotton shirts feel much smoother and are more durable than standard "open-end" cotton. They provide a better surface for DTG and screen printing because there is less "fuzz" (pilling) on the surface.
Combed and Ring-Spun Cotton
The highest quality of cotton used for t-shirts. After the cotton is spun, it is "combed" to remove any short fibers or impurities. This results in an exceptionally soft fabric that is very consistent, making it the ideal canvas for high-detail digital printing.
GSM (Grams per Square Meter)
A metric measurement of fabric weight. A lower GSM (120-140) indicates a lightweight, thin fabric, while a higher GSM (180-200+) indicates a heavyweight, thick fabric. Standard t-shirts usually fall in the 150 to 160 GSM range.
Tri-Blend
A fabric made from a mixture of three materials, typically cotton, polyester, and rayon. Tri-blends are famous for their extreme softness, "drape," and vintage look. They often have a heathered (speckled) appearance because the different fibers take up dye differently.
Pre-shrunk
A garment that has been put through a shrinking process during manufacturing to minimize further shrinking after the customer washes and dries it. While "pre-shrunk" does not mean "will never shrink," it significantly improves the stability of the garment size over time.
Side-Seamed
A construction method where the front and back of the shirt are sewn together with seams running down the sides. This creates a more tailored, retail-ready fit. The alternative is "tubular" construction, which is cheaper but less flattering to the body shape.
Hand Feel
A term used to describe how the fabric or the print itself feels to the touch. A "soft hand" means the print is flexible and barely noticeable, while a "heavy hand" describes a thick, rubbery print (often associated with low-quality heat transfers or heavy plastisol).
Technical Printing Concepts
For those looking to dive deeper, these technical concepts explain the "how" behind the print quality.
Underbase
A layer of white ink printed first on dark-colored garments. The underbase acts as a primer, allowing the colors printed on top to appear vibrant and true to life. Without a white underbase, colors like yellow or red would disappear into the dark fabric of a black or navy shirt.
Curing
The process of using heat to permanently set the ink into the fabric. For plastisol inks, this usually requires reaching a temperature of 320 degrees Fahrenheit. If a garment is not cured properly, the design will crack or wash off after only a few cycles in the laundry.
Flash
A quick application of heat during the printing process to partially dry the top layer of ink. This is most often used after printing the underbase, allowing subsequent colors to be printed on top without smearing or mixing.
Registration
The alignment of different colors in a multi-color design. When a print is "in registration," all colors line up perfectly. "Out of registration" means you might see gaps between colors or overlapping edges where they shouldn't be.
Halftone
A technique used in screen printing to create the illusion of a gradient or a lighter shade of a color using small dots of varying sizes. This allows a printer to achieve a wide range of tones using only a single ink color and screen.
Mesh Count
The number of threads per square inch in a printing screen. A lower mesh count (86 to 110) allows more ink to pass through and is used for glitter or thick athletic prints. A high mesh count (230 to 305) is used for fine details and halftones.
Squeegee
A tool with a flat, rubber blade used to pull ink across a screen and force it through the mesh onto the garment. The hardness (durometer) and angle of the squeegee significantly affect how much ink is deposited.
Sizing and Placement
| Placement Type | Description | Typical Size |
|---|---|---|
| Standard Front Print | The most common placement for t-shirt designs, usually centered on the chest. | 10 to 12 inches wide |
| Left Chest (Pocket) | A small, subtle design placement located over the wearer's left breast. Popular for corporate branding. | 3 to 4 inches wide |
| Oversize / Jumbo Print | A print that covers a large portion of the shirt, often extending toward the bottom hem. | Varies (large format) |
| Nape (Back Neck) | A small logo placed on the back, just below the collar. Often used for secondary branding. | 2 to 3 inches wide |
| Sleeve Print | Design placement along the length of the sleeve. Requires special pallets on the press. | Varies |
Finishing and Fulfillment
Poly-bagging
The process of folding and sealing each individual garment into a clear plastic bag. This protects the shirts during shipping and storage and provides a more professional presentation for retail sales.
Hang Tagging
Attaching a custom branded cardboard tag to the neck label or sleeve of the garment. This is a common practice for clothing brands to display pricing, sizing, and brand storytelling.
Washing Instructions
The specific care steps required to maintain the quality of the print. For most custom apparel, it is recommended to wash the garment inside out in cold water and tumble dry on low or hang dry to preserve the life of the ink or vinyl.
Bulk Order
A large quantity of the same design, usually ordered at once to take advantage of volume discounts. In screen printing, the price per shirt drops significantly as the quantity increases because the setup costs are spread across more units.
Turnaround Time
The total amount of time it takes from the moment an order is placed and the artwork is approved until the finished products are ready for pickup or shipping. Standard industry turnaround is typically 7 to 14 business days, though "rush" services are often available.
Summary: Printing & File Formats
| Method | Best File Format | Best Use Case |
|---|---|---|
| Screen Printing | Vector (.AI, .EPS, .PDF) | Bulk orders, simple colors, high durability. |
| DTG | High-Res Raster (.PNG, .TIFF) | Complex colors, photos, small batches. |
| DTF | Vector or Raster (.PNG) | Almost any fabric, vibrant and thin feel. |
| Sublimation | High-Res Raster | 100% Polyester, all-over prints, no "feel." |
To get started on your own project without worrying about the complexities of file prep, Adobe Express offers an intuitive platform that helps you design and export your artwork correctly every time.
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