Editing Magic lantern (section)

===Slides===
Originally the pictures were hand painted on glass slides. Initially, figures were rendered with black paint but soon transparent colors were also used. Sometimes the painting was done on oiled paper. Usually black paint was used as a background to block superfluous light, so the figures could be projected without distracting borders or frames. Many slides were finished with a layer of transparent lacquer, but in a later period cover glasses were also used to protect the painted layer.<ref>{{cite web|url=http://www.luikerwaal.com/platen1_uk.htm|title=All about lantern slides (1)}}</ref> Most handmade slides were mounted in wood frames with a round or square opening for the picture.<ref>{{cite web|url=http://www.luikerwaal.com/platen2_uk.htm|title=All about magic lantern slides (2)|website=www.luikerwaal.com}}</ref>

[[File:10 Story about a boy falling in a barrel of honey.JPG|thumb|left|A paper rimmed mass-produced slide]]
After 1820 the manufacturing of hand colored printed slides started, often making use of [[decalcomania]] transfers.<ref>{{cite web|url=http://www.luikerwaal.com/platen1_uk.htm#decal|title=All about lantern slides (1)|website=De Luikerwaal}}</ref> Many manufactured slides were produced on strips of glass with several pictures on them and rimmed with a strip of glued paper.<ref name="Timby2016">{{cite journal|url=https://www.academia.edu/23363210|title=Glass Transparencies: Marketing Photography's Luminosity and Precision|last=Timby|first=Kim|author-link=Kim Timby|year=2016|journal=PhotoResearcher|issue=25 }}</ref>

The first photographic lantern slides, called ''hyalotypes'', were invented by the German-born brothers Ernst Wilhelm (William) and [[Frederick Langenheim|Friedrich (Frederick) Langenheim]] in 1848 in [[Philadelphia]] and patented in 1850.<ref name="Timby2016"/><ref>{{Cite web|url=https://patents.google.com/patent/US7784A/en|title=Improvement in photographic pictures on glass}}</ref><ref>{{Cite web|url=http://historiccamera.com/cgi-bin/librarium2/pm.cgi?action=app_display&app=datasheet&app_id=1799&|title=William and Frederick Langenheim at Historic Camera|website=Historic Camera}}</ref>