Final answer:
The primary step in converting an Epson EcoTank ET-2800 printer for sublimation is to replace the existing cartridges with sublimation ink.
Step-by-step explanation:
To convert an Epson EcoTank ET-2800 wireless color all-in-one printer for sublimation, the primary step is to replace the existing cartridges with sublimation ink. Traditional inkjet printers use standard ink cartridges to produce color images with a black jet and three other jets for primary colors: cyan, magenta, and yellow. However, for sublimation printing, the standard ink must be replaced with sublimation ink designed to transfer images onto specific materials when heated.