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.[1] In Italian the term intonaco is also used much more generally for normal plaster or mortar wall-coatings in buildings.
Example of spray fireproofing, using a gypsum based plaster in a low-rise industrial building in Vancouver, British Columbia.
Intonaco is traditionally a mixture of sand (with granular dimensions less than two millimeters) and a binding substance.
Types of intonacoedit
Different types of intonaco are classified based on the binding material used:
Intonaco based on lime, where the only binding substance is hydrated lime
Intonaco lime/cement, where the binding element is a mixture of hydrated lime with Portland cement, with a majority of lime
Intonaco cement/lime, where the binding element is a mixture of hydrated lime, and Portland cement, with a majority of Portland cement
Intonaco with a plaster base, where the binding element is exclusively plaster
The sand utilized in the intonaco can be limestone or silicate, taken from a natural source such as a river or from sand that is pulverized.
Types of stabilizersedit
Intonaco can be stabilized using:
Lime
plaster
Calcium-sulfate based plaster
Terracotta-based cement
Referencesedit
^Ugo Procacci, in Frescoes from Florence,pp. 15-25 1969, Arts Council, London, gives a full account of the process.
December 20, 2023
intonaco, italian, term, final, very, thin, layer, plaster, which, fresco, painted, plaster, painted, while, still, order, allow, pigment, penetrate, into, intonaco, itself, earlier, layer, called, arriccio, laid, slightly, coarsely, provide, intonaco, must, a. 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 1 In Italian the term intonaco is also used much more generally for normal plaster or mortar wall coatings in buildings Example of spray fireproofing using a gypsum based plaster in a low rise industrial building in Vancouver British Columbia Intonaco is traditionally a mixture of sand with granular dimensions less than two millimeters and a binding substance Types of intonaco editDifferent types of intonaco are classified based on the binding material used Intonaco based on lime where the only binding substance is hydrated lime Intonaco lime cement where the binding element is a mixture of hydrated lime with Portland cement with a majority of lime Intonaco cement lime where the binding element is a mixture of hydrated lime and Portland cement with a majority of Portland cement Intonaco with a plaster base where the binding element is exclusively plasterThe sand utilized in the intonaco can be limestone or silicate taken from a natural source such as a river or from sand that is pulverized Types of stabilizers editIntonaco can be stabilized using Lime plaster Calcium sulfate based plaster Terracotta based cementReferences edit Ugo Procacci in Frescoes from Florence pp 15 25 1969 Arts Council London gives a full account of the process Retrieved from https en wikipedia org w index php title Intonaco amp oldid 967917095, wikipedia, wiki, book, books, library,
