<?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">bluing</topic></authority><related type="broader"><topic>materials by function</topic></related><related type="broader"><topic>synthetic dye</topic></related><variant type="other"><topic>blueing</topic></variant> <note xml:lang="en"><![CDATA[ Substances used to optically brighten or whiten materials including textiles and paper, or to give a blue tint to metal, particularly gunmetal. A variety of substances may be used as bluing including many pigments and chemical formulations. ]]></note></mads>