<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31316642</termId><termName>ester gum</termName><termType>PT</termType><termNote><![CDATA[ A modified natural resin made from rosin that has been esterified by heating with a polyhydric alcohol, such as glycerol. Ester gum contains the glyceryl, methyl, and ethyl esters of rosin acids. Ester gum is lighter in color than rosin and have a higher softening point but lower acid number. It is not used in artist paints or varnishes although they have been tried for wax-resin linings. It is used instead of copal, dammar, or kauri in making enamels, paints, nitrocellulose lacquers, and tung oil mixtures.  A modified natural resin made from rosin that has been esterified by heating with a polyhydric alcohol, such as glycerol. Ester gum contains the glyceryl, methyl, and ethyl esters of rosin acids. Ester gum is lighter in color than rosin and have a higher softening point but lower acid number. It is not used in artist paints or varnishes although they have been tried for wax-resin linings. It is used instead of copal, dammar, or kauri in making enamels, paints, nitrocellulose lacquers, and tung oil mixtures. ]]></termNote><termCreatedDate>2026-03-30 20:25:16</termCreatedDate><relation><relationType>UF</relationType><termId>31316643</termId><termName>gum, ester</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31316644</termId><termName>rosin ester</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31303857</termId><termName>resin</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31316639</termId><termName>rosin</termName><termType>PT</termType></relation></term>  </Zthes>