Buon fresco ( Italian for 'true fresh') [1] is a fresco painting technique in which alkaline-resistant pigments, ground in water, are applied to wet plaster.
It is distinguished from the fresco-secco (or a secco) and finto fresco techniques, in which paints are applied to dried plaster.
The buon fresco technique consists of painting with pigment ground in water on a thin layer of wet, fresh, lime mortar or plaster, for which the Italian word is intonaco. Because of the chemical makeup of the plaster, a binder is not required. But, some artists used lime as a binding medium for pigment to slow the drying process of the plaster and continue working for longer periods of time.
After a number of hours the plaster reacts with the air in a process called carbonatation. This chemical reaction fixes the pigment particles at the plaster's surface in a protective crystalline mesh known as the lime crust. [2]
The advantage of buon fresco is its durability. In fresco-secco , by contrast, the color does not become part of the wall and tends to flake off over time. The chief disadvantage of buon fresco is that it must be done quickly without mistakes.
The painter plasters and paints only as much as can be completed in a day, which explains the Italian term for each of these sections, giornata , or a day's work. The size of a giornata varies according to the complexity of the painting within it. A face, for instance, might take an entire day, whereas large areas of sky can be painted quite rapidly. [3] Buon Frescoes are usually done in sections because of the time limitations plaster provides.
Frescoes dating from the 17th century BC using this technique have been found in the excavations of Akrotiri on the island of Santorini in Greece, changing our beliefs about art in prehistoric times. One of the first painters in the post-classical period to use this technique was the Isaac Master in the Upper Basilica of Saint Francis in Assisi. In medieval and Renaissance Italy, a wall to be frescoed was first prepared with a rough, thick undercoat of plaster known as the arriccio. When this was dry, assistants copied the master painter's composition onto it with reddish-brown pigment or charcoal. The artist made any necessary adjustments. [4] Artists that used the buon fresco technique include Raphael, Masaccio, and Michaelangelo. [5] Many renaissance artists painted buon frescoes as backgrounds or under-paintings before they painted seccos on the dry plaster.It takes many days for the carbonization of intonaco so, days would have to elapse between painting the buon fresco and fresco-secco. Some ingredients used in secco were incompatible with the wet plaster and could result in incorrect pigmentation.
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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.
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 a painting method involving the procedure of painting with pigments with a medium of drying oil as the binder. It has been the most common technique for artistic painting on canvas, wood panel or copper 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 color, 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.
This is an alphabetical index of articles related to painting.
Ultramarine is a deep blue color pigment which was originally made by grinding lapis lazuli into a powder. Its lengthy grinding and washing process makes the natural pigment quite valuable—roughly ten times more expensive than the stone it comes from and as expensive as gold.
Oil paint is a type of slow-drying paint that consists of particles of pigment suspended in a drying oil, commonly linseed oil. For several centuries the oil painting has been perhaps the most prestigious form in Western art, but oil paint has many practical uses, mainly because it is waterproof.
Fresco-secco is a wall painting technique where pigments mixed with an organic binder and/or lime are applied onto 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.
Intonaco is an Italian term for the final, very thin layer of plaster on which a fresco is painted. The plaster is painted while still wet, in order to allow the pigment to penetrate into the intonaco itself. An earlier layer, called arriccio, is laid slightly coarsely to provide a key for the intonaco, and must be allowed to dry, usually for some days, before the final very thin layer is applied and painted on. In Italian the term intonaco is also used much more generally for normal plaster or mortar wall-coatings in buildings.
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 a visual art, which is characterized by 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, may be used. One who produces paintings is called a painter.
The Italian Renaissance painter Domenico Ghirlandaio painted the Last Supper of Jesus three times in separate fresco paintings in or near Florence. The oldest of the three is located in the Badia di Passignano (1476). The next painting is the most famous one, painted in the refectory of the Convent of the Ognissanti (1480). The last painting is found at the Convent of San Marco (1486). The last two paintings are found in Florence itself.
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.
Work on the conservation and restoration of Leonardo da Vinci's The Last Supper mural, much of it more harmful than helpful, has been carried out over many centuries, and continues. 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. Painting began in 1495 and continued until 1498.
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 BC. Around 1600 BC, a disastrous earthquake, followed by a volcanic eruption, covered Akrotiri, Greece 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 ft 10 in (1.78 m). 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.