Abstract
The present study focuses on applying a compatible protective treatment for historical pictorial surfaces in ‘El-Harem palace’ (the National Military Museum of Egypt). For this purpose, laboratory painted samples were prepared according to the original materials. The models were treated with acrylic-based polymeric materials, including Paraloid B72, Lascaux® Hydroground 750, and Pebeo Satin Matt Picture Varnish (a transparent varnish of an acrylic resin and polyethylene wax). The stability of the treated surfaces against accelerated UV and thermal ageing was evaluated via optical microscopy (OM), colour measurements, scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FTIR). The results showed that the behaviour of the tested polymers against accelerated ageing tests is comparable, to some extent. Based on its acceptable stability, Pebeo Satin Matt picture varnish was used as a protective coating for the murals. Significantly, the results of this research will help in protecting rare examples of Rococo-style mural paintings in Egypt.
Highlights
Rococo is probably derived from two words: „rocaille‟ and „coquille', to describe ornamentations made of small stones and irregular-shape shells
The present study focuses on applying a compatible protective treatment for historical pictorial surfaces in ‘El-Harem palace’
This style is an elegant artistic technique, mainly for interior decorations, which was developed in Europe during the 18th-century.Rococo-style is characterized by soft pastel colours, floral motifs, asymmetrical patterns, and multiple curvy lines [1].The combination of Western influences and the Ottoman art led to the appearance of 'Turkish Rococo Style‟, which was extensively applied in the second half of the 18thcentury [2].During the 19th-centrury in Egypt, Rococo was used extensively to decorate several buildings of Muhammad Ali‟s family (1805–1952 A.D)
Summary
Rococo is probably derived from two words: „rocaille‟ and „coquille', to describe ornamentations made of small stones and irregular-shape shells. Previous studies were devoted to report the degradation aspects of oil-based paints [7,8,9,10], and the durability of surface coatings for their protection [11,12,13,14].Protective coatings are usually applied to prevent any damage induced by the surrounding environment. These coatings should be resistant to the deleterious effects of ultraviolet radiation. The assessment was designed to determine the optical characteristics, chromatic change, surface morphology, and the molecular behaviour
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