Preserved castings is based on various casting experiments with plaster. The experiments contain the way different pigments and oxides behave when mixed with regular plaster. The coloured layers create different patterns, which some of them bond and some of tem merge in the previous layer of casted plaster. After drying, the colours disappear and show nog sign of existence. When finished with a special bio-degradable coating the colours re-appear and are preserved in the final object.