<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31410229</termId><termName>siderography</termName><termType>PT</termType><termNote><![CDATA[ Process of engraving and printing from steel plates for the production of documents requiring long runs with precise replication, such as banknotes or postage stamps. It is mechanical a process developed by Jacob Perkins in the early 1800s, which enables the transfer of an impression from a steel plate to a steel cylinder in a rolling press. For the related printmaking process using steel or steel-faced copper plates, use "steel engraving." ]]></termNote><termCreatedDate>2026-03-30 20:50:18</termCreatedDate><relation><relationType>BT</relationType><termId>31371542</termId><termName>engraving</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31368064</termId><termName>siderographers</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31410236</termId><termName>steel engraving</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31467252</termId><termName>siderographs</termName><termType>PT</termType></relation></term>  </Zthes>