From her stained glass making days, ROBINA JACK has adapted to perfection the use of pattern and imagery in the earthenware bowls and platters which she decorates with slips in singing colours. She and her sculptor husband Guy Taplin enjoy exotic travel which gives rise to much of her inspiration.   Living near the Essex marshes, she also draws on other subjects from her love of sea-faring, birds, flowers and domestic creatures, frequently expressing their playful nature.