DSF

Hi! I'm new to sublimation.
Using:
Ricoh Aficio SG 2100n printer
120G Subli-sharp sublimation paper (inkexpress.co.uk)
Ricoh GC-41 Refillable Ink Cartridges with Subli-Sharp Premium Gel Dye Sublimation Ink (from inkexpress.co.uk)
and I'm not happy with results at all, when choose paper to glossy and quality priority + high resolution image (1200 dpi)
Print looks afoul. Loads white dots, as result my sublimation is very poor quality. (pictures attached)
What is the problem? Can anybody help me please!!!
Many thanks.

You'll find a number of posts regarding the 2100 printer above, have a good read there as well

If you look at this grainy picture, what it may be? Paper or ink issue?