Collotype

A photomechanical produced image made from a photographic image, with similarities to the lithographic printing process. The process evolved gradually from the work of A.L. Poitevin in the 1850s and is still in occasional use. It produces prints which can be of very high quality with finely detailed images and the appearance of having continuous tone. A finished collotype, especially if varnished, is often difficult to distinguish from a true photograph.

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Queen Elizabeth I as patroness of Geography and Astronomy, by Emery Walker Ltd, after  Remigius Hogenberg, early 20th century (1579) - NPG  - © National Portrait Gallery, London

Queen Elizabeth I as patroness of Geography and Astronomy
by Emery Walker Ltd, after Remigius Hogenberg
early 20th century (1579)
NPG D31837

The Gunpowder Plot Conspirators, 1605, by Unknown artist, (circa 1605) - NPG  - © National Portrait Gallery, London

The Gunpowder Plot Conspirators, 1605
by Unknown artist
(circa 1605)
NPG D2334

Sir John Everett Millais, 1st Bt, published by The British and Foreign Artists

Sir John Everett Millais, 1st Bt
published by The British and Foreign Artists' Association, after Charles Albert Waltner, after Sir John Everett Millais, 1st Bt
1 January 1881 (1880)
NPG D33173

William Hillier Onslow, 4th Earl of Onslow, by The Autotype Company, after  Henry James Haley, 1900 - NPG  - © National Portrait Gallery, London

William Hillier Onslow, 4th Earl of Onslow
by The Autotype Company, after Henry James Haley
1900
NPG D9885

Ranjitsinhji (

Ranjitsinhji ('Ranji') Vibhaji, Maharaja Jam Sahib of Navanagar
by Ernest Clarence Elliott, for Elliott & Fry
published 1904
NPG Ax39987

Sir Edward John Poynter, 1st Bt, after Sir Edward John Poynter, 1st Bt, 1904 - NPG  - © National Portrait Gallery, London

Sir Edward John Poynter, 1st Bt
after Sir Edward John Poynter, 1st Bt
1904
NPG D9904

Sir Walter Edgeworth-Johnstone, by Ernest Clarence Elliott, for  Elliott & Fry, published 1904 - NPG  - © National Portrait Gallery, London

Sir Walter Edgeworth-Johnstone
by Ernest Clarence Elliott, for Elliott & Fry
published 1904
NPG Ax39966

Arthur Ralph Douglas Elliot, by The Autotype Company, after  Miss C.B. Leighton, (1905) - NPG  - © National Portrait Gallery, London

Arthur Ralph Douglas Elliot
by The Autotype Company, after Miss C.B. Leighton
(1905)
NPG D20788

Francis John Stephens Hopwood, 1st Baron Southborough, after (John) Byam Liston Shaw, (1912) - NPG  - © National Portrait Gallery, London

Francis John Stephens Hopwood, 1st Baron Southborough
after (John) Byam Liston Shaw
(1912)
NPG D9800

Michio Itow, by Alvin Langdon Coburn, published by  Duckworth & Co, 22 October 1915 - NPG  - © reserved; collection National Portrait Gallery, London

Michio Itow
by Alvin Langdon Coburn, published by Duckworth & Co
22 October 1915
NPG Ax7829

John Henry Bernard, after Sir Francis Bernard (

John Henry Bernard
after Sir Francis Bernard ('Frank') Dicksee
(1924)
NPG D9628

Richard Hamilton, by Richard Hamilton, 1970 - NPG  - © DACS

Richard Hamilton
by Richard Hamilton
1970
NPG 5278

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