Fresco is a technique of mural painting executed upon freshly laid ("wet") lime plaster. Water is used as the vehicle for the dry-powder pigment to merge with the plaster, and with the setting of the plaster, the painting becomes an integral part of the wall. The word fresco is derived from the Italian adjective fresco meaning "fresh", and may thus be contrasted with fresco-secco or secco mural painting techniques, which are applied to dried plaster, to supplement painting in fresco. The fresco technique has been employed since antiquity and is closely associated with Italian Renaissance painting.
The Creation of Adam, a detail of the fresco Sistine Chapel ceiling by Michelangelo
Etruscan fresco. Detail of two dancers from the Tomb of the Triclinium in the Necropolis of Monterozzi 470 BC, Tarquinia, Lazio, Italy
A Roman fresco of a young man from the Villa di Arianna, Stabiae, 1st century AD.
Fresco by Giotto, Scrovegni Chapel in Padua. Sky and blue mantle of Maria were painted a secco, and large part of the painting is now lost
Plaster is a building material used for the protective or decorative coating of walls and ceilings and for moulding and casting decorative elements. In English, "plaster" usually means a material used for the interiors of buildings, while "render" commonly refers to external applications. The term stucco refers to plasterwork that is worked in some way to produce relief decoration, rather than flat surfaces.
Stucco plaster reliefs, such as this work at the Chateau de Fontainebleau, were hugely influential in Northern Mannerism. A plaster low-relief decorative frieze is above it.
Applying mud plaster to an outside wall
Clay plaster base coat on split oak lath held in place with straw and manure, covered with a lime plaster top coat, Old Economy Village, Pennsylvania (1827)
Lime setting-coat on clay plaster with straw binder. Applied to hand-split lath over a timber framed wall of a brick family house at Old Economy Village, Pennsylvania