[Research Method and Spectral Analysis of Ancient Polychromatic Silicate Artifacts]

Area of Science:

• Materials Science
• Archaeometry
• Spectroscopy

Context:

• Ancient polychromatic silicate artifacts present unique analytical challenges.
• Non-invasive techniques are crucial for preserving cultural heritage objects.

Purpose:

• To develop and validate an efficient, non-invasive analytical method for ancient polychromatic silicate artifacts.
• To characterize the spectral properties, chemical compositions, and mineral phases of artifact surfaces.

Summary:

• A novel methodology integrating multispectral imaging, X-ray fluorescence (XRF), and laser Raman spectroscopy (LRS) was applied to five ancient polychromatic silicate artifacts.
• Analysis revealed major compositions of SiO2, PbO, and BaO, identifying the artifacts as PbO-BaO silicates.
• Copper ions were identified as the coloring agent in fluorescent areas, with various mineral phases including Chinese blue and purple also characterized.

Impact:

• Establishes a more efficient and less damaging research method for analyzing ancient polychromatic silicate artifacts.
• Connects spectral characteristics with chemical composition, enhancing the understanding of these artifacts.
• Provides a framework for future non-invasive material analysis in cultural heritage studies.