<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31409921</termId><termName>hydroxypropyl cellulose</termName><termType>PT</termType><termNote><![CDATA[ Hydroxypropyl cellulose (HPC) is a water-soluble cellulose ether used as an emulsifier, thickener, and suspending agent in many types of solutions. In conservation, HPC is used as a consolidant for leather afflicted by "red rot", and as a fixative for pigments and dyes. ]]></termNote><termCreatedDate>2026-03-30 20:50:13</termCreatedDate><relation><relationType>UF</relationType><termId>31409922</termId><termName>HPC</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31409923</termId><termName>cellulose, hydroxypropyl</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31409924</termId><termName>hydroxypropylcellulose</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31371022</termId><termName>cellulose ether</termName><termType>PT</termType></relation></term>  </Zthes>