Buon fresco (Italian for true fresco) is a fresco painting technique in which watercolors are applied to plaster when it is still wet, as opposed to fresco-secco (or a secco). Fresco (plural either frescos or frescoes) is any of several related Painting types done on Plaster on walls or Painting (pān'tīng in Art, is the practice of applying Color to a Surface (support base such as e Watercolor ( US) or Watercolour ( UK) (and "aquarelle" in French is a Painting method The term plaster can refer to plaster of Paris Lime plaster, or Cement plaster. Fresco-secco (or a secco) is a Fresco Painting technique in which watercolors are applied to dry Plaster that has been moistened to Technique consists of painting in pigment mixed with water on a thin layer of wet, fresh, lime mortar or plaster, for which the Italian word for plaster, intonaco, is used. For the drug referred to as "pigment" see Black tar heroin. Water is a common Chemical substance that is essential for the survival of all known forms of Life. Mortar is a workable paste formed by mixture of Cement, Water and fine aggregate Masonry to bind construction blocks together and fill the gaps between The term plaster can refer to plaster of Paris Lime plaster, or Cement plaster. Intonaco is an Italian term for the final very thin layer of Plaster on which a Fresco wall painting is painted Because of the chemical makeup of the plaster, a binder is not required, as the pigment mixed solely with the water will sink into the intonaco, which itself becomes the medium holding the pigment. A binder is an ingredient used to bind together two or more other materials in mixtures The pigment is 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. 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. The Basilica of San Francesco d'Assisi in Assisi, Italy is the burial place of St Francis and the mother church of the Franciscan Order Assisi (əˈsiːzi or /əˈsiːsi/ ( Latin: Asisium) is a Town in Italy in Province of Perugia, Italy, in the Umbria
Buon fresco contrasts with finto fresco, a technique in which paints are applied to dried plaster. A finto fresco ( It 'false fresh' is a painting in which paints are applied to a dry plaster wall
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