<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31437363</termId><termName>smalt</termName><termType>PT</termType><termNote><![CDATA[ A coarsely ground blue potassium glass containing small amounts of cobalt oxide, which provides the source of the blue color. It is used as a blue colorant in paints, glazes, glass, bluing paper, laundry blue, starch, textiles, and rubber. Although it was intended as a substitute in painting for natural ultramarine blue, which was very expensive, it was discovered that smalt blue discolors when placed in an oil-based medium. ]]></termNote><termCreatedDate>2026-03-30 20:57:55</termCreatedDate><relation><relationType>UF</relationType><termId>31437364</termId><termName>Dumont blue</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31437365</termId><termName>Hungary blue</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31437366</termId><termName>Saxon blue</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31437367</termId><termName>azure blue</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31437368</termId><termName>starch blue</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31411022</termId><termName>synthetic inorganic blue pigment</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31437297</termId><termName>blue bice</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31375030</termId><termName>smalt</termName><termType>PT</termType></relation></term>  </Zthes>