<?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">dry plates</topic></authority><related type="broader"><topic>photographic plates</topic></related><variant type="other"><topic>dry plate</topic></variant> <note xml:lang="en"><![CDATA[ Initially, the term referred to sheets of glass coated with collodion subsequently sensitized and dried. In 1871 Richard Leach Maddox discovered that an emulsion of gelatin containing a sensitive silver salt could be exposed to the action of light in a dry state. This provided a leap forward in photographic media as it simplified the process of taking photographs, avoiding the necessity of plates being prepared immediately before exposure, and processed immediately after. ]]></note></mads>