<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31305953</termId><termName>etch</termName><termType>PT</termType><termNote><![CDATA[ A solution of gum arabic and acid used in desensitizing lithographic plates and stones. ]]></termNote><termCreatedDate>2026-03-30 20:22:19</termCreatedDate><relation><relationType>UF</relationType><termId>31305954</termId><termName>gum arabic etch</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31305955</termId><termName>gum etch</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31305956</termId><termName>lithographic acid</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31305957</termId><termName>lithographic etch</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31298939</termId><termName>materials by function</termName><termType>PT</termType></relation></term>  </Zthes>