One of the most common causes of disappointing DTF prints
Semi-transparent pixels are one of the most common causes of disappointing DTF prints.
Semi-transparent pixels (anything not fully solid or fully invisible) often print much lighter than expected (due to the layer of white ink under the graphic) and can create unwanted "halos" or fuzzy edges around your design.
When creating masks or deleting backgrounds, always make sure anti-aliasing is turned off. Anti-aliasing creates soft, semi-transparent edges that can cause problems when printing. Imagine creating an image for a black shirt with a 90% opaque outline — and then layering a coat of white ink under that. The image would now have a 10% white (grey) outline around the image.
Important Order: Always do your upscaling first, then create your masks or remove backgrounds. Doing anti-aliasing or feathering before upscaling can create jagged outlines that are hard to fix later.
For the best results, keep your important edges fully opaque (100% alpha). Clean, hard edges almost always produce the sharpest and most professional DTF prints.