Pigment ink is for heat transfers 100% cotton or 50/50. Sublimation is for 50/50 or 100% polyester and other hard imprintable item with a special coating IE mugs, tiles , license plates ect. An Epson 1800 uses pigment ink as stock so it should print decent pictures as well as heat transfers. Cobra inks is a good place to start for heat transfer ink. Sawgrass has the market for sublimation but the 1800 isnt a good choice for sublimation.