<?xml version="1.0" encoding="utf-8"?><metadata xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/"><dc:title xml:lang="en">crystoleums</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31431679</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 20:56:27</dcterms:created><dcterms:isPartOf xsi:type="dcterms:URI">http://AATesaurus.cultura.gencat.cat/aat/getty_en</dcterms:isPartOf><dcterms:isPartOf xml:lang="en">Tesaurus d&apos;Art i Arquitectura</dcterms:isPartOf><dc:format>text/html</dc:format> <dcterms:alternative xml:lang="en">chromo-crystal</dcterms:alternative> <dcterms:alternative xml:lang="en">chromo-photographs</dcterms:alternative> <dcterms:alternative xml:lang="en">crystal ivorytypes</dcterms:alternative> <dcterms:alternative xml:lang="en">crystoleum</dcterms:alternative> <dcterms:alternative xml:lang="en">kartaline</dcterms:alternative> <dcterms:alternative xml:lang="en">photo-chromes</dcterms:alternative> <dc:description xml:lang="en"><![CDATA[ Distinctive photographs made from a hand-colored positive image process used from the 1880s through 1910, intended to give the appearance of painting on glass. An albumen paper print is adhered to a curved piece of glass and sanded from the back to the emulsion layer. A layer of oil is applied to render it translucent, and detailed color is applied to the back. When dry, a second layer of curved glass is added, and painted with broad fields of color. A layer of white material was applied behind this, and everything bound together. The glass, solutions, and adhesives were available commercially until World War I. The process was based on 18th-century hand-colored engravings known as mezzotint paintings. ]]></dc:description></metadata>