Pannotype
The pannotype (from the Latin pannus = cloth) is an analogue positive collodion image that was conceived by French photographer Jean Nicolas Truchelut in 1852 and used between 1853 and 1880 .
functionality
The pannotype is based on a slightly exposed and developed collodion layer containing iodine and bromine silver , which is detached from the glass negative and transferred to black oilcloth or leather. This gives the whitish negative its positive image effect. Due to the dark field principle , the negative appears as a positive against a dark background .
This procedure had the advantage that, in contrast to the ambrotype , the image could not break. The disadvantage was that the substrate dried out and the image cracked or fell apart. With the spread of the ferrotype and the albumin process , it disappeared again. Today pannotypes are very rare, because apart from the fact that they were only produced over a relatively short period of time, only a few specimens have survived due to the sensitivity of the material.
See also
Other early photography techniques:
- Heliography (1826)
- Calotype (also talbotype ; around 1835)
- Cyanotype (1842)
- Ambrotype ( melanotype ; around 1850)
- Ferrotype ( tintype or German metal sheet photography ; around 1850)
- Collodion wet plate (around 1850)
- Wothlytypia (1864)
literature
- Josef Maria Eder : Detailed handbook of photography. Volume 1, Part 1: History of Photography. Half 1. 4., completely reworked and increased edition. Knapp, Halle (Saale) 1932, p. 513.
