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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 word fresco is commonly and inaccurately used in English to refer to any wall painting regardless of the plaster technology or binding medium. This, in part, contributes to a misconception that the most geographically and temporally common wall painting technology was the painting into wet lime plaster. Even in apparently Buon fresco technology, the use of supplementary organic materials was widespread, if underrecognized.
A mural is any piece of graphic artwork that is painted or applied directly to a wall, ceiling or other permanent substrate. Mural techniques include fresco, mosaic, graffiti and marouflage.
Oil painting is the process of painting with pigments with a medium of drying oil as the binder. It has been the most common technique for artistic painting on wood panel or canvas for several centuries, spreading from Europe to the rest of the world. The advantages of oil for painting images include "greater flexibility, richer and denser colour, the use of layers, and a wider range from light to dark". But the process is slower, especially when one layer of paint needs to be allowed to dry before another is applied.
Paint is any pigmented liquid, liquefiable, or solid mastic composition that, after application to a substrate in a thin layer, converts to a solid film. It is most commonly used to protect, color, or provide texture. Paint can be made in many colors—and in many different types. Paint is typically stored, sold, and applied as a liquid, but most types dry into a solid. Most paints are either oil-based or water-based and each has distinct characteristics. For one, it is illegal in most municipalities to discard oil-based paint down household drains or sewers. Clean-up solvents are also different for water-based paint than they are for oil-based paint. Water-based paints and oil-based paints will cure differently based on the outside ambient temperature of the object being painted Usually, the object being painted must be over 10 °C (50 °F), although some manufacturers of external paints/primers claim they can be applied when temperatures are as low as 2 °C (35 °F).
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. Another imprecise term used for the material is stucco, which is also often used for plasterwork that is worked in some way to produce relief decoration, rather than flat surfaces.
Oil paint is a type of slow-drying paint that consists of particles of pigment suspended in a drying oil, commonly linseed oil. The viscosity of the paint may be modified by the addition of a solvent such as turpentine or white spirit, and varnish may be added to increase the glossiness of the dried oil paint film. The addition of oil or alkyd medium can also be used to modify the viscosity and drying time of oil paint. Oil paints were first used in Asia as early as the 7th century AD and can be seen in examples of Buddhist paintings in Afghanistan. Oil-based paints made their way to Europe by the 12th century and were used for simple decoration, but oil painting did not begin to be adopted as an artistic medium there until the early 15th century. Common modern applications of oil paint are in finishing and protection of wood in buildings and exposed metal structures such as ships and bridges. Its hard-wearing properties and luminous colors make it desirable for both interior and exterior use on wood and metal. Due to its slow-drying properties, it has recently been used in paint-on-glass animation. The thickness of the coat has considerable bearing on the time required for drying: thin coats of oil paint dry relatively quickly.
Fresco-secco is a wall painting technique where pigments mixed with an organic binder and/or lime are applied onto a dry plaster. The paints used can e.g. be casein paint, tempera, oil paint, silicate mineral paint. If the pigments are mixed with lime water or lime milk and applied to a dry plaster the technique is called lime secco painting. The secco technique contrasts with the fresco technique, where the painting is executed on a layer of wet plaster.
Silicate mineral paints or mineral colors are paint coats with mineral binding agents. Two relevant mineral binders play a role in the field of colors: Lime and silicate.
Sinopia is a dark reddish-brown natural earth pigment, whose reddish colour comes from hematite, a dehydrated form of iron oxide. It was widely used in Classical Antiquity and the Middle Ages for painting, and during the Renaissance it was often used on the rough initial layer of plaster for the underdrawing for a fresco. The word came to be used both for the pigment and for the preparatory drawing itself, which may be revealed when a fresco is stripped from its wall for transfer.
Distemper is a decorative paint and a historical medium for painting pictures, and contrasted with tempera. The binder may be glues of vegetable or animal origin. Soft distemper is not abrasion resistant and may include binders such as chalk, ground pigments, and animal glue. Hard distemper is stronger and wear-resistant and can include casein or linseed oil as binders.
The conservation-restoration of the frescoes of the Sistine Chapel was one of the most significant conservation-restorations of the 20th century.
Giornata is an art term, originating from an Italian word which means "a day's work." The term is used in Buon fresco mural painting and describes how much painting can be done in a single day of work. This amount is based on the artist's past experience of how much they can paint in the many hours available while the plaster remains wet and the pigment is able to adhere to the wall.
Painting is the practice of applying paint, pigment, color or other medium to a solid surface. The medium is commonly applied to the base with a brush, but other implements, such as knives, sponges, and airbrushes, can be used.
Most Tibetan Buddhist monasteries, temples and other religious structures in the Himalayas were decorated with Tibetan Buddhist wall paintings. Despite much destruction in Tibet itself, many of these survive, the dry climate of the Tibetan plateau assisting their survival, as the wet Indian climate has reduced survival of paintings from there. There are some regional differences, but the techniques described here cover the traditional wall paintings across this area. The wall paintings were executed on earthen plaster with the secco-technique. A secco-technique is a painting technique in which the pigments with their binder are employed to paint onto a dry wall.
The region of Shekhawati in Rajasthan is remarkable for its wealth of mural paintings which adorn the walls of many buildings, including havelis.
The conservation and restoration of frescoes is the process of caring for and maintaining frescos, and includes documentation, examination, research, and treatment to insure their long-term viability, when desired.
The conservation-restoration of Leonardo da Vinci's The Last Supper is an ongoing project that has spanned many centuries. Completed in the late 15th century by the Renaissance artist Leonardo da Vinci, the mural is located in the refectory of the Convent of Santa Maria delle Grazie, Milan, Italy. The Last Supper was commissioned by Ludovico Sforza, Duke of Milan in 1495, as part of a series of renovations to the convent with the intention that the location would become the Sforza family mausoleum. Work began on The Last Supper in 1495 and lasted until 1498. The scene is understood to depict the Bible verse John 13:22, showing the reactions of the Twelve Disciples, at the Last Supper, in the moments following Jesus’s announcement that one among them will betray him.
The Akrotiri Boxer Fresco, discovered in 1967, is one of the Wall Paintings of Thera and a leading example of Minoan painting. It is a fresco depicting two young boys wearing boxing gloves and belts and dates back to the Bronze Age, 1700 BCE. Around 1600 BCE, a disastrous earthquake, followed by a volcanic eruption, covered Akrotiri in a thick layer of pumice and ash, which resulted in the remarkable conservation of frescoes, including the Akrotiri Boxer Fresco, from multiple buildings throughout the town. This particular fresco was found in room B1 of Building Beta along with the Antelope Fresco. The boys' shaved heads and stray locks indicate their youth, while their darker skin tone indicates their gender. The boy on the right is completely nude except for a belt, whereas the boy on the left has jewellery; most likely markers of a higher status. They appear to be slightly over life-size at roughly 5'10". To create such vibrant frescoes, a smooth lime plaster was applied to the walls and then painted over. It is impossible to know whether the match was a competitive one or simply a routine sport.
The conservation and restoration of Pompeian frescoes describes the activities, methods, and techniques that have historically been and are currently being used to care for the preserved remains of the frescoes from the archeological site of Pompeii, Italy. The ancient city of Pompeii is famously known for its demise in A.D. 79 after the fatal eruption of Mount Vesuvius wiped out the population and buried the city beneath layers of compact lava material. In 1738, King Charles III or Charles of Bourbon, began explorations in Portici, Resina, Castellammare di Stabia, a Civita, where it was believed that the ancient cities of Pompeii, Stabiae, and Herculaneum were buried beneath. The first phase of the excavations at Pompeii started in 1748, which led to the first conservation and restoration efforts of the frescoes since their burial, and in 1764, open-air excavations began at Pompeii. Pompeii has a long history of excavation and restoration that began without a strong foundation or strategy. After centuries of cronyism, recurring financial shortages, and on-again-off-again restoration, the city's frescoes and structures were left in poor condition. In 1997, Pompeii was added to the UNESCO List of World Heritage Sites.
Mineral painting or Keim's process, also known as stereochromy, is a mural or fresco painting technique that uses a water glass-based paint to maximize the lifetime of the finished work.
References
- Stokstad, Marilyn; Art History, 2011, 4th ed., ISBN 0-205-79094-1
