15 g, 200th anniversary of the birth of the photographer Janez Puhar (2014)

Mass			15 g
Purity			925 / 1000
Silver content			13,875 g
Dimensions (diameter)			32 mm
Face value			30 EUR
Strike year			2014
Mintage			2.500

Source: National Museum of Slovenia

 

Even as a student he had a remarkable talent for languages and music, and was also interested in botany, mathematics, physics and chemistry. When reading journals about the latest scientific findings he came across the Daguerreotype, photography on a copper plate with a polished silver surface. Because the process was very expensive, he made use of glass and adapted the chemicals used in the process, thereby discovering the exceptional advantages of glass. He wrote his first report of his experiments with the Daguerreotype in the newspaper Carniolia in 1841. In April 1842 he invented photography on glass, a pioneering contribution to the history of photography. He named the process the “hyalotype” (today also known as the puharotype), or svetlopis in Slovene. Puhar reported his findings in Carniolia, and in Innerösterreichisches Industrie- und Gewerbe Blatt in 1843. After Puhar’s report was published in 1851 by Vienna’s Academy of Sciences, in 1852 the National Academy of Agriculture, Manufacturing and Commerce in Paris awarded him honorary membership and a diploma recognising him as the “inventor of photography on glass”. His photographs were exhibited in London (1851), New York (1852) and Paris (1855). Very few of his original works have been preserved. Apart from a few pictures on glass, there are also some of the photographs on paper that Puhar made by his own process.