<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31411813</termId><termName>bone black</termName><termType>PT</termType><termNote><![CDATA[ Material created by charring animal bones, black in color. Bone black is composed of about 10% carbon and 84% calcium hydroxyapatite along with smaller amounts of magnesium phosphate and calcium carbonate. It is used primarily as a pigment and as a decolorizing and deodorizing agent. As a stable blue-black pigment, it is dense and has a good working quality for oil paints and watercolors. It is also used in engraving inks and as a decolorizing agent for refining sugars and syrups.  ]]></termNote><termCreatedDate>2026-03-30 20:50:44</termCreatedDate><relation><relationType>UF</relationType><termId>31411814</termId><termName>black, bone</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31411815</termId><termName>bone char</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31411816</termId><termName>bone-black</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31437245</termId><termName>carbon black</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31374559</termId><termName>charcoal</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31438335</termId><termName>ivory black</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31438337</termId><termName>drop black</termName><termType>PT</termType></relation></term>  </Zthes>