The Gallery holds the most extensive collection of portraits in the world. Search over 215,000 works, 150,000 of which are illustrated from the 16th Century to the present day.

Advanced Collection search

Glass positive

From 1850 onwards flat sheets of glass were used as supports for light-sensitive materials used in photography. They were used for positives, like the ambrotype, or more frequently, for photographic negatives. Albumen, collodion, and gelatin carrying light-sensitive silver salts have all been successfully used for coating glass plates to use in the camera. The term 'glass plate' most often applies to the collodion process.

Previous 1 OF 1 Next

Rupert Brooke
by Sherril Schell
April 1913
NPG P101(e)

Rupert Brooke
by Sherril Schell
April 1913
NPG P101(b)

Rupert Brooke
by Sherril Schell
April 1913
NPG P101(f)

Rupert Brooke
by Sherril Schell
April 1913
NPG P101(g)

Previous 1 OF 1 Next

Discover

Scientific techniques

Watch our playlist exploring scientific techniques used by the Gallery to unlock the secrets behind our Tudor portraits.

Watch now

Subjects and themes

Search the collection by themes - from pets to weddings!

Discover the Collection


Black History Month

Take a tour exploring our Collection created by Alayo Akinkugbe for Black History Month in 2020.

Take the tour

A Picture of Health

Learn about pioneers in medicine, health and social reform from 1840 to 1920.

Explore the timeline