AA2A 'Plus' - Earthenware Chargers

I'm producing a few white earthenware chargers in the studios at college. They are pressmoulded over a hump mould (Ah the joys of a slab roller! Yes please Santa) I'm bisque firing them without any decoration as I intend to paint majolica style directly on top of a tin white glaze, the first chargers will be painted with velvet underglazes instead of oxides, this will create a vibrant contemporary style which should compliment my ideas of portraying modern scenes taking direct influence from the historical chargers in the collection of York Museums Trust.