MRS Proceedings

Table of Contents - Volume  1047  - Symposium Y – Materials Issues in Art and Archaeology VIII  

Editors : P. Vandiver, F. Casadio, B. McCarthy, R.H. Tykot, J.L.R. Sil

Articles

The Grolier Codex: A Non Destructive Study of a Possible Maya Document using Imaging and Ion Beam Techniques

2007 MRS Fall Meeting.

Jose Luis Ruvalcabaa1, Sandra Zetinaa2, Helena Calvo del Castilloa3, Elsa Arroyoa4, Eumelia Hernándeza5, Marie Van der Meerena6 and Laura Soteloa7

a1 sil@fisica.unam.mx, UNAM, Instituto de Fisica, Apdo. postal 20-364, Mexico, 01000, Mexico, + 52 55 56225162, + 52 55 56225009

a2 sandra.zetina@gmail.com, Universidad Nacional Autónoma de México, Instituto de Investigaciones Estéticas, Mexico DF, Mexico

a3 hcalvo@ulg.ac.be, Universidad Nacional Autónoma de México, Instituto de Fisica, Apdo. postal 20-364, Mexico DF, 01000, Mexico

a4 elsa2001@gmail.com, Universidad Nacional Autónoma de México, Instituto de Investigaciones Estéticas, Mexico DF, Mexico

a5 euihernandez@gmail.com, Universidad Nacional Autónoma de México, Instituto de Investigaciones Estéticas, Mexico DF, Mexico

a6 vander@cablevision.net.mx, Instituto Nacional de Antropología e Historia, Coordinacion Nacional de Conservacion del Patrimonio Cultural, Mexico DF, N/A, Mexico

a7 sotelos@servidor.unam.mx, Universidad Nacional Autónoma de México, Centro de Estudios Mayas, Instituto de Investigaciones Filológicas, Mexico DF, N/A, Mexico

Abstract

The Grolier Codex has been a controversial document ever since its late discovery in 1965. Because of its rare iconographical content and its unknown origin, specialists are not keen to assure its authenticity that would set it amongst the other tree known Maya codes in the world (Dresden, Paris Codex and Madrid Codex).

The document that has been kept in the Museo Nacional de Antropología in Mexico City, after its exposure in 1971 at the Grolier Club of New York, has been analyzed by a set of non-destructive techniques in order to characterize its materials including paper fibers, preparation layer and colors composition. The methodology included UV imaging, IR reflectography and optic microscopy examinations as well as Particle Induced X-ray Emission (PIXE) and Rutherford Backscattering Spectrometry (RBS) using an external beam setup for elemental analysis. All the measurements were carried out at 3MV Pelletron Accelerator of the Instituto de Física, UNAM. The aim of this work is to verify if the materials in the Grolier Codex match those found for other pre-Hispanic documents.

From the elemental composition we concluded that the preparation layer shows the presence of gypsum (CaSO4), color red is due to red hematite (Fe2O3) and black is a carbon-based ink. These results agree with previous analyses carried out by Scanning Electron Microscopy (SEM-EDX) on few samples. However, the presence of Maya Blue in the blue pigment cannot be assured. The examination using UV and IR lights shows homogeneity in the inks and red color but dark areas that contain higher amounts of K in the preparation layer. This paper discusses the results obtained for the UV-IR examinations and the elemental analysis. A comparison with other studies on pre-Hispanic and early colonial codex is presented.

(Received March 17 2008)

(Accepted August 11 2008)

Key Words

  • ion beam analysis;
  • Rutherford backscattering (RBS);
  • archaeology
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