Woodburytype

Invented in the 1860's the process was patented in 1864 by Mr Walter B. Woodbury. The process was used only for a few decades, and is now an obsolete photomechanical process originally developed to create true continuous-tone images. A continuous-tone process that is more well-known and currently used by printmakers and graphic artists is collotype. Both are based on the same idea - creating a gelatin relief by exposing a transparent original in contact with a light-sensitive gelatin layer.

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Benjamin Disraeli, Earl of Beaconsfield, by W. & D. Downey, 1868 - NPG  - © National Portrait Gallery, London

Benjamin Disraeli, Earl of Beaconsfield
by W. & D. Downey
1868
NPG x659

James Henry Mapleson, by Lock & Whitfield, 1870s - NPG  - © National Portrait Gallery, London

James Henry Mapleson
by Lock & Whitfield
1870s
NPG Ax25054

'Group taken at Hughenden Manor'
by Henry William Taunt & Co, published by A.W. Cowan
1874; published 1881
NPG Ax27804

Matthew Webb, by Horatio Nelson King, 1875 - NPG  - © National Portrait Gallery, London

Matthew Webb
by Horatio Nelson King
1875
NPG x19929

Amy Roselle (Mrs Arthur Dacre), by Unknown photographer, circa 1876 - NPG  - © National Portrait Gallery, London

Amy Roselle (Mrs Arthur Dacre)
by Unknown photographer
circa 1876
NPG Ax7627

Kuo Sung-tao, by Lock & Whitfield, 1880 or before - NPG  - © National Portrait Gallery, London

Kuo Sung-tao
by Lock & Whitfield
1880 or before
NPG x132257

Leonora Braham as Patience in

Leonora Braham as Patience in 'Patience'
by London Stereoscopic & Photographic Company, published by Charles Dickens & Evans
published 1 March 1882
NPG x6415

William Ewart Gladstone, by Elliott & Fry, published by  Bickers & Son, published 1886 - NPG  - © National Portrait Gallery, London

William Ewart Gladstone
by Elliott & Fry, published by Bickers & Son
published 1886
NPG Ax27805

Sir Henry Irving, by Lock & Whitfield, published by  Sampson Low, Marston, Searle and Rivington, published 1883 - NPG  - © National Portrait Gallery, London

Sir Henry Irving
by Lock & Whitfield, published by Sampson Low, Marston, Searle and Rivington
published 1883
NPG Ax17711

Randolph Churchill, by Unknown photographer, circa 1885 - NPG  - © National Portrait Gallery, London

Randolph Churchill
by Unknown photographer
circa 1885
NPG x6116

Maude Millett (Mrs Tennant), by Alfred Ellis, published September 1893 - NPG  - © National Portrait Gallery, London

Maude Millett (Mrs Tennant)
by Alfred Ellis
published September 1893
NPG x12527

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