<?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">bone black</topic></authority><related type="narrower"><topic>ivory black</topic></related><related type="narrower"><topic>drop black</topic></related><related type="broader"><topic>carbon black</topic></related><related type="broader"><topic>charcoal</topic></related><variant type="other"><topic>black, bone</topic></variant><variant type="other"><topic>bone char</topic></variant><variant type="other"><topic>bone-black</topic></variant> <note xml:lang="en"><![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.  ]]></note></mads>