<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31373973</termId><termName>Mars pigment</termName><termType>PT</termType><termNote><![CDATA[ "Mars" is now the common name used for synthetic iron oxide pigments. Mars colors are made from hydrated iron oxide co-precipitated with alum using lime or potash. The proportion of the mixture controls the degree of color; drying the product produces Mars yellow, other colors include orange, red, black, brown, and violet, produced by calcining the yellow. "Mars" was originally a brand name in the late 18th century. ]]></termNote><termCreatedDate>2026-03-30 20:40:51</termCreatedDate><relation><relationType>UF</relationType><termId>31373976</termId><termName>pigment, Mars</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31373974</termId><termName>Mars colors</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31373975</termId><termName>Mars pigments</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31343660</termId><termName>pigment by production method</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31437204</termId><termName>earth color</termName><termType>PT</termType></relation></term>  </Zthes>