In fact these classical sculptures would probably have originally been painted but by the time they were rediscovered in post classical times the paint had worn away.
Terracotta vs marble sculpture.
A statue of david the biblical hero who slayed the giant goliath had been ordered in 1464.
Baked earth from the latin terra cocta a type of earthenware is a clay based unglazed or glazed ceramic where the fired body is porous terracotta is the term normally used for sculpture made in earthenware and also for various practical uses including vessels notably flower pots water and waste water.
A work piece coated with a ceramic casing is baked in a kiln that bakes the kilns and removes.
Terracotta was soon employed for altar pieces pulpits and fonts as also was an ever cheaper type of stucco made from marble dust and sand.
Marble sculpture was rarely decorated because a plain white surface like those of classical greek and roman marble sculptures was considered the most desirable finish.
The newly discovered work is 22 95 inches.
Terracotta terra cotta or terra cotta pronounced ˌtɛrraˈkɔtta.
The range of sculpture was considerably extended by a greater introduction of terracotta which was a much cheaper substitute for marble and when glazed and fired equally durable.
As a format that allows the most distinctive characteristics of an individual to be depicted with much less work and therefore expense and occupying far less space than a full length statue the bust has been since ancient times a popular style of life size portrait sculpture it can also be executed in weaker materials such as terracotta.
It was a flexible and versatile medium which could rival painting in its exploitation of colour and movement to create credible figures in the round.
Terracotta was widely used in ancient art notably in chinese pottery from 10 000 bce and in greek pottery from 7 000 bce as well as mesopotamian sculpture and egyptian sculpture plus minoan art from crete and etruscan art on the italian mainland.
Sulfuration is the main destroyer of marble producing imaginary not true patina.
Magnesium silicate saturated with deionized water is a safe and simple cleaner.
Terracotta was often used as a substitute for marble or bronze especially outside central italy where there were no available marble quarries.
The first two put into place in the early 15th century were a statue of joshua sculpted in terra cotta by donatello and painted white to look like marble and a statue of hercules sculpted by one of donatello s students agostino di duccio.
Michelangelo was known to make preliminary terracotta studies before embarking on a marble sculpture and they typically corresponded to an old florentine measure of length known as the braccio fiorentino or florentine arm the florentine arm translates to 22 80 inches.
Other reasons for the discoloration of marbles are discussed.