<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31320072</termId><termName>mordant</termName><termType>PT</termType><termNote><![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. ]]></termNote><termCreatedDate>2026-03-30 20:26:16</termCreatedDate><relation><relationType>UF</relationType><termId>31320073</termId><termName>mordants</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31305939</termId><termName>surface preparation materials</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31344122</termId><termName>aqua fortis</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31344123</termId><termName>Dutch mordant</termName><termType>PT</termType></relation></term>  </Zthes>