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Item Detail
Summary
Studio portraits of a woman and a man.
Year
1890.
Warnings and disclaimer
Title supplied by cataloguer. The basic opalotype technique, involving wet collodion and silver gelatin, was patented in 1857 by Glover and Bold of Liverpool. Opalotypes exploited two basic techniques, using either the transfer of a carbon print onto glass, or the exposure of light-sensitive emulsion on the glass surface to the negative. Opalotype photography, never common, was practiced in various forms until it waned and disappeared in the 1930s. "Milk glass positive" is another alternative term for an opalotype.
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