<?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">mordant</topic></authority><related type="narrower"><topic>aqua fortis</topic></related><related type="narrower"><topic>Dutch mordant</topic></related><related type="broader"><topic>surface preparation materials</topic></related><variant type="other"><topic>mordants</topic></variant> <note xml:lang="en"><![CDATA[ Chemical substance that fixes a dye in or on a substance by combining with the dye to form an insoluble compound. In etching, refers to a corrosive substance, such as a nitric acid solution, used to corrode or bite the exposed areas of a metal plate. In gilding, refers to a viscous substance used to adhere the gold leaf to a surface. ]]></note></mads>