You've seen it everywhere brilliantly colored custom shirts on Etsy, vivid phone cases, mugs with photos that look like they're under glass. That's sublimation printing. But the moment you try to research it, most articles throw an equipment list at you before explaining the actual process. That's backwards. Understanding why it works is what lets you use it correctly. Here's the core of it: Sublimation printing turns solid ink into gas and permanently bonds that gas to pol