{{Short description|Backlit moulded thin porcelain artwork}} {{For|the moth|Lithophane (moth)}} {{distinguish|Lithophone}} [[File:Lithophanie1 auflicht.jpg|thumb|upright 0.9|Lithophane of Frederick the Great, lit from front. After a well known painting by Julius Schrader (1849).<ref>''Frederick the Great after the Battle of Kolín'' by Julius Schrader, now in Munich, see Battle of Kolín</ref>]] thumb|The same lithophane, backlit
A '''lithophane''' is a thin plaque of translucent material, normally porcelain, which has been moulded to varying thickness, such that when lit from behind the different thicknesses show as different shades, forming an image. Only when lit from behind does the image display properly.<ref>[https://www.schedel-gardens.org/what-is-a-lithophane.html "How Lithophanes Are Made"], Blair Museum of Lithophanes; [https://books.google.com/books?id=3GRRAAAAYAAJ&dq=lithophane+porcelain&pg=PA96 ''Library of Universal Knowledge''], Volume 9, p. 96, 1880; {{cite news |last1=Milburn |first1=Sandra J. |title=Do you know what a lithophane is? Find out at a workshop at the Hutchinson library |url=https://www.hutchnews.com/story/news/2022/05/25/lithophane-workshop-librarys-makerspace-illuminates-photos-hutchinson-public-kansas/9713073002/ |access-date=19 March 2023 |publisher=The Hutchinson News |date=25 May 2022}}</ref> They were invented in the 19th century and became very popular, typically for lampshades, nightlights, or to be hung on windows. They could also be given stands, to be placed in front of a light source.<ref>Savage & Newman, 180–181; Carney; [https://www.schedel-gardens.org/the-collection.html Types of use], Blair Museum of Lithophanes</ref> The longest side of a lithophane is typically between {{cvt|6|and|10|in|cm}}. [[File:Lithophanie - Tischlampe, Porzellan, Vista Alegre, D2196.jpg|thumb|Lamp by Vista Alegre, Portugal]]
The images tended to be artistically unadventurous, mostly repeating designs from prints, or paintings via reproductive prints. A large number were rather sentimental domestic genre scenes, though there were also portraits, landscapes and religious subjects.<ref>Battie, 160; Savage & Newman, 180–181; Carney</ref> The technique naturally produced images only in grisaille, tones of grey, but later ones were often painted in translucent paint such as that used for watercolours to give colour images. The name comes from Greek; ''lithos'' means "stone," and ''phainen'', means "to cause to appear".<ref name="auto1">Carney</ref>
Invented in France in the 1820s, they rapidly became popular and produced in various countries. But Germany soon became the main producer, remaining so for the rest of the century. The largest producer was the Prussian Königliche Porzellan-Manufaktur (KPM) in Berlin, leading to "Berlin transparencies" becoming a common term for them in English.<ref>Savage & Newman, 180; Hampshire</ref> The Plauesche Porzellanmanufaktur in Plaue, Thuringia, Germany, was another large manufacturer, who continued to make them into the second half of the 20th century.<ref name="auto1"/>
Their peak of production was perhaps from about 1840 to 1870.<ref name="auto1"/> By the end of the 19th century lithophanes had largely fallen from fashion, but in recent decades they have had something of a revival, using in addition to porcelain, glass, plastic, and with 3D printing sometimes paper.<ref name="auto">Hampshire</ref>
==Technique== To make a porcelain lithophane, a wax plaque was placed on a glass backing and carved, so that by lighting from behind the developing image could be seen in a similar fashion to the final lithophane. A cast of the wax was then taken in plaster of Paris, which became the reuseable mould for the porcelain. This was generally left unglazed as biscuit porcelain.<ref>Savage & Newman, 180–181</ref> As lithophanes became produced in larger numbers, more durable metal moulds were often used.<ref>Carney; [https://www.schedel-gardens.org/what-is-a-lithophane.html "How Lithophanes Are Made"], Blair Museum</ref>
As the porcelain is in places only about {{cvt|1/8|in|mm}} thick, wastage in firing was high, up to about 60%.<ref name="auto1"/>
==History== {{Multiple image | image1 = Colt lithophane 1855 - ambient light.jpg | image2 = Colt lithophane 1855 - backlit.jpg | footer = Lithophane of Samuel Colt in 1855, lit from front and back | total_width = 400 }}
There were precedents in Chinese porcelain, in a technique known as an hua, meaning "secret" or "hidden decoration".<ref>{{cite web|url=http://www.gotheborg.com/glossary/anhua.shtml|title = Chinese Porcelain Glossary: An hua|accessdate=3 April 2015}}</ref> But this seems to have been produced by scratching or engraving the unfired porcelain body,<ref name="auto"/> and was mostly used for floral decoration, or text inscriptions, often Buddhist, rather than the images in the Western tradition.<ref name="auto1"/> It was also mostly used on closed vessel shapes such as vases and teapots, suggesting that a backlit view was not intended to be used.
The European technique was invented by the French diplomat Baron Paul de Bourgoing (1791–1864), who patented it in 1827. His friend Baron Alexis du Tremblay had a pottery on his estate at Rubelles, and the earliest examples were made there. As de Bourgoing did not feel it appropriate, as a diplomat, for his name to be used in commerce, the lithophanes were marked "AdT" (for Tremblay's name).<ref>Savage & Newman, 180–181; Hampshire</ref>
Other factories quickly adopted the technique, many under licence from de Bourgoing. Meissen porcelain made them from 1829, and had made tens of thousands by 1850.<ref>Battie, 159–160</ref> Apart from Berlin and Plaue, mentioned above and perhaps the largest manufacturers, they were also made by Volkstedt, St Petersburg and Royal Copenhagen.<ref>Battie, 160</ref>
There was an English patent, under licence from Bourgoing, granted in 1828, to a Robert Griffith Jones, who then gave sub-licences to English factories including Mintons, Copelands (later part of Spode) and Grainger's Factory in Worcester, later merged into Royal Worcester.<ref>Savage & Newman, 181</ref>
By the end of the century the fashion was largely over, but lithophanes were made to commemorate the Coronation of Edward VII in 1902.<ref name="auto"/> By the middle of the 20th century, the technique was used in Japan, mostly for gaudy teasets for American soldiers after World War II, with the lithophaned face of a geisha at the bottom of the cups.<ref name="auto"/>
==Modern lithophanes== Porcelain lithophanes are still made in limited numbers, by both studio potters and large manufacturers such as Bernardaud and Wedgwood.<ref>[https://www.bernardaud.com/en/us/categories/candles-votives/led-votivelights Bernardaud website]; [https://ceramicartsnetwork.org/ceramics-monthly/ceramics-monthly-article/a-new-path-with-lithophanes ''Ceramics Monthly'', "A new path with Lithophanes"]; [https://www.ceramichistorian.com/hannahblackwell/ Ceramic Historian]; [https://www.lithophanemuseum.org/post/all-about-eggs-stephanie-osser-solo-exhibition Lithophane Museum blog]</ref>
Similar effects can be achieved in moulded coloured glass, but these should probably not be called lithophanes. The term has revived in use for images created by digitally-controlled cutting ("CNC"), a subtractive process, or by 3D printing, an additive one. Many companies now offer to make one-off images, or the equipment to make them. Solutions are offered to add colour to these.<ref name=Fabrication>{{cite journal |title=Fabrication of personalized lithophane via additive manufacturing |author=<!--Not stated-->|date=2022 |journal= Sustainable Operations and Computers |volume=3 |pages=17–21 |publisher= Elsevier B.V. |doi=10.1016/j.susoc.2021.09.001 |s2cid=240584496 |quote=|doi-access=free |bibcode=2022SusOC...3...17S }}</ref><ref name=Core> {{cite web |url=https://core-electronics.com.au/guides/3d-printing/3d-print-lithophanes/|title= Perfectly 3D Print All Types of Lithophanes and Add Colour|author=Tim |date=April 12, 2022 |website= |publisher=Core Electronics |access-date=August 20, 2022 |quote=}}</ref><ref>{{Cite web|url=https://www.carvewright.com/assets/tips/CarveWrightTips_and_Tricks_Jan09.pdf Lithophanes|title=101}}</ref>
==Collections== Most museums with a collection of 19th-century porcelain have examples of lithophanes, though only a small number are likely to be on display. The largest collection belongs to the Blair Museum of Lithophanes, now at the Schedel Arboretum and Gardens in Elmore, Ohio.<ref name="auto"/><ref>{{Cite web|url=https://www.schedel-gardens.org/blair-museum-history.html|title=Blair Museum History|website=Schedel Arboretum and Gardens}}</ref>
==Gallery== <gallery> File:Lithophanie - Lichtschirm, Eisenkunstguss 41 cm, D2429.jpg|German, with cast-iron stand File:Lithophanie - Lampenschirm für 6 Trapeze, D1358.jpg|German, set in metal lampshade File:Lithophanie – Stövchen, Eisenblech, D2444-0.jpg|Teapot warmer, or nightlight File:HPM 147 - Madonna mit Kind und Engelsschar, nach Murillio.jpg|''Madonna and Child'' after Murillo, with suspension chain File:BPM 528 - Im mütterlichen Gespräch.jpg|German scene with painted colour File:Lithophane - Gueixas em litofania.jpg|20th-century Japanese cups, with lithophane faces of geishas File:Porcelain lithophane luminary.jpg|Modern porcelain lithophane on stand File:3D-Druck_Lithophanie.jpg|3D printed Wikipedia logo File:Lithophane lamp shade.jpg|Modern porcelain lampshade, lit from inside File:Lithophane lamp shade daylight.jpg|The same porcelain lampshade, in ambient light File:CNC Lithophane - cat.jpg|CNC machine cutting lithophane of a cat </gallery>
==Notes== {{reflist}}
==References== *Battie, David, ed., ''Sotheby's Concise Encyclopedia of Porcelain'', 1990, Conran Octopus, {{ISBN|1850292515}} *Carney, Margaret, [https://davefinneganceramics.files.wordpress.com/2014/11/lithophanes-and-asia.pdf "Lithophanes and Asia: Translucent Translations"], ''Ceramics Monthly'', Oct 2007, Vol. 55, Issue 8 *"Hampshire", [https://collections.hampshireculture.org.uk/topic/short-history-lithophanes" A Short History of Lithophanes"], Hampshire Cultural Trust *Savage, George, and Newman, Harold, ''An Illustrated Dictionary of Ceramics'', 1985, Thames & Hudson, {{ISBN|0500273804}}
==Further reading== * Carney, Margaret (2008), ''Lithophane'', Schiffer Publishing, {{ISBN|9780764330193}} * Harold Newman, "Lithophane Plaques", ''Antique Dealer and Collectors Guide'', August 1990, Statuscourt
==External links== {{commons category|Lithophane}}
*[https://tool.itslitho.com/ Online Lithophane Converting Tool] *[http://www.denfordata.com/pdfs/lithophane_tutorial.pdf Lithophane Tutorial] *[https://www.schedel-gardens.org/blair-museum-of-lithophanes.html The Blair Museum of Lithophanes], Ohio
Category:Porcelain Category:Types of pottery decoration Category:Lighting Category:French inventions