<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31344811</termId><termName>ferric chloride</termName><termType>PT</termType><termNote><![CDATA[ Material used as an ingredient of mordants in the production of etchings rather than nitric acid due to its ability to produce more selectively vertical lines. ]]></termNote><termCreatedDate>2026-03-30 20:33:00</termCreatedDate><relation><relationType>UF</relationType><termId>31344812</termId><termName>chloride, ferric</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31344813</termId><termName>chloride, iron</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31344814</termId><termName>iron chloride</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31344815</termId><termName>iron perchloride</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31344816</termId><termName>iron, perchloride of</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31344817</termId><termName>perchloride of iron</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31344818</termId><termName>perchloride, iron</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31320494</termId><termName>salt</termName><termType>PT</termType></relation></term>  </Zthes>