Are sublimation printed blanks food safe?

Food safety depends on the blank, not the ink.

Yes, sublimation can be food-safe, but only when the blank itself is certified food-safe before printing. The sublimation ink does not sit on the surface; it transfers into the polymer coating of the product. 

If the manufacturer certifies that the coated mug, plate, or product meets food-contact safety standards, then sublimating it does not change that safety rating. Most sublimation mugs, drinkware and plates are already food-safe.

Reputable suppliers sell sublimation ceramics and drinkware specifically made with food-safe polymer coatings.

Where you should be cautious:

• Don’t sublimate on surfaces that touch food unless the blank is certified for it. (Example: metal ornaments, photo panels, MDF boards — these are not food-safe.)
• Don’t apply sublimation to cutting surfaces or cookware unless the manufacturer states it is suitable.

If the blank is food-safe, the sublimation process won’t make it unsafe.