Street Art Graffiti Murals

• Historical mural techniques
In the history of mural several methods have been used:
A fresco painting, from the Italian word affresco which derives from the adjective fresco ("fresh"), describes a method in which the paint is applied on plaster on walls or ceilings. The buon fresco technique consists of painting in pigment mixed with water on a thin layer of wet, fresh, lime mortar or plaster. The pigment is then absorbed by the wet plaster; after a number of hours, the plaster dries and reacts with the air: it is this chemical reaction which fixes the pigment particles in the plaster. After this the painting stays for a long time up to centuries in fresh and brilliant colors.
Secco painting is done on dry plaster (secco is "dry" in Italian). The pigments thus require a binding medium, such as egg (tempera), glue or oil to attach the pigment to the wall.