How to print melamine coasters?

[UK Printed Mugs]

Has anyone got any knowledge on how melamine coasters are printed please? We are getting hit hard by gift printing competitors by selling melamine coasters at a lot less than sublimated ones. Thank you.

[ArferMo]

Another example of how sublimation blanks are overpriced. They could be pad printed or silk screen, or UV but UV being slow tends to up the price.