<?xml version="1.0" encoding="utf-8"?><metadata xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/"><dc:title xml:lang="en">microfadeometry</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31317459</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 20:25:29</dcterms:created><dcterms:isPartOf xsi:type="dcterms:URI">http://AATesaurus.cultura.gencat.cat/aat/getty_en</dcterms:isPartOf><dcterms:isPartOf xml:lang="en">Tesaurus d&apos;Art i Arquitectura</dcterms:isPartOf><dc:format>text/html</dc:format> <dc:description xml:lang="en"><![CDATA[ Microfadeometry is a recently developed technique that measures color changes and evaluates light stability in individual objects of art that are sensitive to light exposure. A microfade tester (MFT) uses a powerful xenon arc lamp and filters to focus a beam of very intense light through a fiber optic onto a tiny spot on the surface of the artwork.  A second fiber optic collects the reflected light and delivers it to a miniature spectrometer.  As the lamp fades the surface of the artwork, the resulting color change is monitored by the spectrometer.   ]]></dc:description></metadata>