Darker images seem to hide the spot. Here, however, you may run into a quality issue. Screen printing will not give the resolution that other processes can give. Flexo is best suited for specialty printing, such as shoe laces and name tags. The substrate to be sublimated and the quantity will dictate the equipment.
Specialty presses to do caps, mugs, and plates are available.
It is slow to do ceramics. Large platten presses are available. This allows for many pieces to be transferred at the same time thereby bringing down the cost of transferring. This is for large orders only. Rotary heat presses are used in conjunction with ink jet and electrostatic plotters.