What is the ideal binder for photosensitive materials in wet plate photography?

Using collodion as an ideal adhesive for wet printing photographic sensitive materials.

Brief introduction of collodion

Collodion glue, also known as collodion glue, is a paste glue made by dispersing collodion glue in the mixed solution of ethanol and ether. Light yellow, with ether smell, easy to burn. When collodion is coated on the surface of an object, it will evaporate quickly, leaving a tough film that is impermeable to water. Collodion without other drugs can be used to close the bottle stopper and protect the wound. The membrane of collodion and other drugs can prolong the contact between drugs and skin.

Second, the development history of wet printing photography

1, the original assumption: people want to have clear images and detailed shadows like the photos taken by Daguerre method, and print many photos cheaply and quickly like Carlo method, so someone put forward the idea of making negative films with transparent film base instead of paper base.

2. "Egg white glass" photography:19th century, only glass can be used to make transparent films. 1847, Nipps's nephew, Saint Victor, first obtained the patent right of "egg white glass" photography. The photosensitizer mixed in egg white is very limited, and the exposure time is about 5 to 15 seconds, which is not suitable for taking pictures. However, it is very suitable for making "egg white photographic paper", and also suitable for developing photos and making slides.

3. Photographic method of collodion (wet version): 185 1 year, a sculptor in London, England (Fredrick Scott Archer1813 _1857) found that nitrocellulose was dissolved in collodion of ether and alcohol. Collodion should be used immediately after preparation and will not be exposed to light after drying, so this photography method is called "wet printing".