<?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">aristotypes</topic></authority><related type="other"><topic>aristotype</topic></related><related type="other"><topic>aristo paper</topic></related><related type="broader"><topic>photographic prints by process</topic></related><variant type="other"><topic>aristotype</topic></variant> <note xml:lang="en"><![CDATA[ Photographic prints made on a gelatin-silver chloride photographic paper introduced commercially in 1867 by the Munich-born chemist Johann Baptist Obernetter. This was considered the first industrial ready-to-use photographic paper print process. Aristotypes are composed of a paper layer, a layer of baryum sulphate in gelatin, and a layer of emulsion containing silver chloride suspended in a binder. The baryta layer made purer whites possible. As this was was a printing-out-paper, aristotypes are exclusively contact prints. ]]></note></mads>