it’s a method of printing that transfers a design into a material or fabric using Sublimation ink and heat press machine.  it’s a game changer in that it allows whole garment prints — designs that go seam-to-seam

The Sublimation printing Process

For the best sublimation results, it is best used with polyester materials.

It can be used with a range of materials that have a specialist polymer coating, such as those found on mugs, mouse pads, coasters, and more.

In some cases, it is also possible to use sublimation on glass, but it needs to be normal glass that has been treated and prepared correctly with a Sublimation Coating

Aside from the materials that can be used for sublimation, one of the core limitations for sublimation is the colors of any materials. Because sublimation is essentially a dye process, you get the best results when the fabrics are either white or light-colored. If you want to print onto a black shirt or darker materials, then you could be better off using a digital print solution instead.