<?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">invisible ink</topic></authority><related type="broader"><topic>ink by property</topic></related><variant type="other"><topic>ink, invisible</topic></variant><variant type="other"><topic>secret ink</topic></variant><variant type="other"><topic>sympathetic ink</topic></variant> <note xml:lang="en"><![CDATA[ Ink that is invisible on paper until heat or other substance is applied to make it visible, or when the paper is held up to a light. ]]></note></mads>