Carbon print

Discovered in 1855 by A.L. Poitevin, the carbon process was the first to produce photographic prints that were permanent as they contained no silver impurities that would deteriorate over time. Paper coated with a gelatin containing a carbon black pigment was exposed under a negative in daylight. The paper was then washed to remove the soluble gelatin leaving the residue carbon image. The process was popular between 1870-1900 and produced either black or deep rich brown glossy dark prints.

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John Hanning Speke, by Southwell Brothers, 1863 - NPG  - © National Portrait Gallery, London

John Hanning Speke
by Southwell Brothers
1863
NPG P658

Queen Alexandra, by Symonds and Co, 1877 - NPG  - © National Portrait Gallery, London

Queen Alexandra
by Symonds and Co
1877
NPG x17460

Queen Victoria, by Alexander Bassano, 1887 (1882) - NPG  - © National Portrait Gallery, London

Queen Victoria
by Alexander Bassano
1887 (1882)
NPG x38284

Sir Sayaji Rao III, Maharaja of Baroda, by Unknown photographer, published 1889 - NPG  - © National Portrait Gallery, London

Sir Sayaji Rao III, Maharaja of Baroda
by Unknown photographer
published 1889
NPG Ax28670

Mrs Humphry Ward (Mary Augusta Ward, nee Arnold), by Herbert Rose Barraud, published by  Eglington & Co, published 1889 - NPG  - © National Portrait Gallery, London

Mrs Humphry Ward (Mary Augusta Ward, nee Arnold)
by Herbert Rose Barraud, published by Eglington & Co
published 1889
NPG Ax5470

Hafiz Abdul Karim; Queen Victoria, by Hills & Saunders, July 1893 - NPG  - © National Portrait Gallery, London

Hafiz Abdul Karim; Queen Victoria
by Hills & Saunders
July 1893
NPG P51

Lord Henry Cavendish-Bentinck, by J. Rogers, 1900s - NPG  - © National Portrait Gallery, London

Lord Henry Cavendish-Bentinck
by J. Rogers
1900s
NPG x144175

Cecil Henry Meares; Lawrence Oates, by Herbert George Ponting, 26 May 1911 - NPG  - © National Portrait Gallery, London

Cecil Henry Meares; Lawrence Oates
by Herbert George Ponting
26 May 1911
NPG P121

Robert Falcon Scott, by Herbert George Ponting, 7 October 1911 - NPG  - © National Portrait Gallery, London

Robert Falcon Scott
by Herbert George Ponting
7 October 1911
NPG P23

Albert Ball, by Argent Archer, circa 1915 - NPG  - © National Portrait Gallery, London

Albert Ball
by Argent Archer
circa 1915
NPG P657

Lallie Charles Cowell (nee Martin), by Rita Martin, circa 1920 - NPG  - © National Portrait Gallery, London

Lallie Charles Cowell (nee Martin)
by Rita Martin
circa 1920
NPG x125438

Hester Sassoon (nee Gatty), by F.J. Arnott, mid 1920s - NPG  - © National Portrait Gallery, London

Hester Sassoon (nee Gatty)
by F.J. Arnott
mid 1920s
NPG x45991

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