<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">photosensitive glass</topic></authority><related type="broader"><topic>glass by property</topic></related><variant type="other"><topic>glass, photosensitive</topic></variant> <note xml:lang="en"><![CDATA[ Clear silicate glass that will form permanent three-dimensional color photographic images when subjected to x-rays or ultraviolet light through a negative. Photosensitive glass contains submicroscopic metallic particles; the high energy causes the particles to precipitate out of solution. The image is fixed by heating the glass to 540 C. ]]></note></mads>