Method: Macro X-ray fluorescence mapping (MAXRF)
Alternative labels
MAXRF
XRF mapping
XRF imaging
Description
Macro X-ray Fluorescence Imaging (Macro-XRF) is a non-destructive chemical analysis technique used to study the composition and distribution of inorganic chemical elements in large-scale samples, such as artworks and archaeological artifacts. Based on the interaction between X-rays and matter, the technique utilizes the X-ray fluorescence generated when a sample is irradiated with an X-ray beam. Atoms within the sample, when excited, emit characteristic radiation that allows their chemical composition to be identified. Unlike traditional XRF analysis, which focuses on a single point, Macro-XRF enables the scanning of large surfaces, producing two-dimensional maps with variable spatial resolution (typically between 250 and 1000 micrometers), depending on the size of the analyzed area. This capability is particularly useful for studying paint layers, pigments, pentimenti, or materials hidden beneath the surface of an artwork, offering insights into artistic or manufacturing techniques, creative processes, and production methods.
Techniques
Macro x-ray fluorescence spectroscopy scanning (macro-xrf)
Type
Non invasive
Version
4.0
Parameters
Type: X-ray Source Power
Unit: W
Value: 30
Type: detectable elements
Unit: Atomic number
Value: ≥13
Type: lateral resolution
Unit: micrometre
Value: 250-1000