<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31319822</termId><termName>hardener</termName><termType>PT</termType><termNote><![CDATA[ Material added to paint or varnish to increase gum or resin content or to increase rate of oxidation, so as to cause an increase in hardness of the drying film. ]]></termNote><termCreatedDate>2026-03-30 20:26:12</termCreatedDate><relation><relationType>BT</relationType><termId>31305843</termId><termName>additive</termName><termType>PT</termType></relation></term>  </Zthes>