There are two types of images: raster and vector. Raster images use pixels. The higher number of pixels an image contains, the better resolution it will have; better quality prints.
Pixels have a direct effect on the scaling capabilities of an image. The more pixels an image contains, the larger it can be scaled without becoming boxy, or “pixelated.”
Vector images, however, use mathematical calculations between two different points to create geometrical shapes. The process itself uses lines instead of pixels, and because of that, they are infinitely scalable. No matter how large you scale a vector image, it will not lose its quality. When you view a photo on a computer screen, it usually requires a fairly low PPI (Pixels Per Inch) count – around 72, generally. For digital viewing, that’s fine. But when it comes to printing, both on t-shirts and paper, the higher the PPI count, the better. Ideally, we request customers submit photos at 300 PPI. If that’s not possible, no worries! Our design team is always happy to help. Whether submitting a vector or raster image, here are some of the most commonly accepted file formats: