<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">Mars pigment</topic></authority><related type="other"><topic>earth color</topic></related><related type="broader"><topic>pigment by production method</topic></related><variant type="other"><topic>Mars colors</topic></variant><variant type="other"><topic>Mars pigments</topic></variant><variant type="other"><topic>pigment, Mars</topic></variant> <note xml:lang="en"><![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. ]]></note></mads>