<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31317746</termId><termName>sulfiding</termName><termType>PT</termType><termNote><![CDATA[ A deteriorative process affecting silver photographic images, in which the silver reacts with sulfur from the air or from within the print itself to form silver sulfide, causing the print to yellow and fade. ]]></termNote><termCreatedDate>2026-03-30 20:25:34</termCreatedDate><relation><relationType>UF</relationType><termId>31317747</termId><termName>sulphided</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31317748</termId><termName>sulfided</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31304831</termId><termName>color changes</termName><termType>PT</termType></relation></term>  </Zthes>