Results 241 to 250 of about 131,783 (293)

Egyptian blue ? Cuprorivaite a window to ancient Egyptian technology

Naturwissenschaften, 1983
Egyptian Blue, a multicomponent synthetic blue pigment has been recorded in ancient Egypt since the Fourth Dynasty of the Old Kingdom (2600–2480 B.C.). The pigment consisting of cuprorivaite (CaCuSi4O10) with variable amounts of wollastonite (CaSiO3), Cu-rich glass and cuprite (Cu3O) or tenorite (CuO) was prepared by melting the copper-rich ingredient ...
Jaksch, H., Seipel, W., Weiner, K. L., Goresy, A. El.   +3 more
openaire   +6 more sources

Technological characterisation of egyptian blue

Revue d'Archéométrie, 1981
The principal aim has been to obtain information on the procedures used in antiquity to produce the different fabrics, ranging from soft and friable to hard and semi-vitrified, which are composed of Egyptian Blue. Four pieces of Egyptian Blue from Egypt and Mesopotamia have been examined using the scanning electron microscope and have been compared ...
Tite, Michael S., Bimson, Mavis, Meeks, Nigel D.   +2 more
openaire   +2 more sources

Production and characterization of Egyptian blue and Egyptian green frit

Journal of Cultural Heritage, 2000
Abstract Production of Egyptian blue and green frit was obtained by pure chemicals and natural raw Egyptian materials in different experimental conditions. Changes in stoichiometric ratios and in melting temperatures were tested to synthesize the expected pigments.
Pierluigi Bianchetti, Fabio Talarico, Maria Giuseppina Vigliano, Mona Fuad Ali   +3 more
openaire   +1 more source

A short note on Egyptian blue

Journal of Cultural Heritage, 2004
Abstract We studied first the feasibility of the reaction synthesis of EB in molten alkaline carbonates; then we changed to “solid phase” syntheses, comparing the yields according to the proportion of the various components. In molten carbonates azurite was produced, which turned to malachite at room temperature.
MAZZOCCHIN, Gian Antonio, RUDELLO D., BRAGATO C., AGNOLI F.   +3 more
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Egyptian blue: modern myths, ancient realities

Journal of Roman Archaeology, 2016
Colours containing bright and saturated blue hues were popular for painterly effects in most of the Mediterranean cultures dating from the Bronze Age to the fall of the Roman Empire. Pigments providing the desired blue were produced from precious minerals such as azurite and lapis lazuli, but bright blue hues also came from pigments produced by merging
Skovmøller, Amalie, Brøns, Cecilie, Sargent, Maria Louise   +2 more
openaire   +1 more source

Investigating the provenance of Egyptian blue pigments in ancient Roman polychromy

Archeometriai Műhely, 2021
Egyptian blue is a copper-based blue pigment that was widely used across the Mediterranean from ca. 3300 BC up to late antiquity and even later. For this case study, we analyzed the provenance of Egyptian blue from a Campana relief from the collection of the Ny Carlsberg Glyptotek, Denmark. Campana reliefs are terracotta plaques, which were named after
Rodler A. S., Matthys S. M., Brons C., Artioli G., Snoeck C., Debaille V., Goderis S.   +6 more
openaire   +3 more sources

The thermoluminescence (TL) of Egyptian Blue

International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements, 1988
Abstract Egyptian Blue is a synthesized crystalline pictorial pigment with formula CaCuSi 4 O 10 . It has been used in Egypt and Mesopotamia from the 3rd millenium B.C. A preliminary experiment on a recently synthesized samples showed that this pigment is thermoluminescent after β irradiation ( 90 Sr).
M. Schvoerer, M.-C. Delavergne, R. Chapoulie   +2 more
openaire   +1 more source

Color Alteration of Ancient Egyptian Blue Faience

International Journal of Architectural Heritage, 2013
Four different colored faience tiles were found in South Tomb of King Djoser in Saqqara, Egypt. The tiles suffer from various deterioration aspects, mainly color alteration, which occurred as a result of the reaction between present salts and the free copper ions of blue faience and changing it into greenish blue, dark green, and light green.
Abubakr Moussa, Mona Fouad Ali
openaire   +1 more source

The Blackening of Paint Containing Egyptian Blue

Studies in Conservation, 2004
On ancient Egyptian artifacts, paint containing Egyptian blue pigment is often found to have become brownish green or even black.
Vincent Daniels, Rebecca Stacey, Andrew Middleton   +2 more
openaire   +1 more source

“Amarna blue” painted on ancient Egyptian pottery

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2002
Abstract “Amarna blue” pigments (18 Dynasty, c. 1400 BC) painted on pottery fragments were investigated using the PIXE, XRF and XRD methods in laboratories and also using a portable type of X-ray spectrometer at the sites of excavation. On the blue-colored part enrichment of Na, Al, S, Cl, Ca, Mn, Co, Ni and Zn was found using X-ray spectroscopy, and
M. Uda, M. Nakamura, S. Yoshimura, J. Kondo, M. Saito, Y. Shirai, S. Hasegawa, Y. Baba, K. Ikeda, Y. Ban, A. Matsuo, M. Tamada, H. Sunaga, H. Oshio, D. Yamashita, Y. Nakajima, T. Utaka   +16 more
openaire   +1 more source