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A selection of my photographs, many from Edinburgh throughout the year.   Also photos from Scotland, London, Iceland, Italy, Hong Kong and elsewhere    Many old maps of Edinburgh (Old Town, New Town, while City), Leith and Newhaven.  Includes several old transport maps and a comparison of old maps with recent aerial photos.   Old engravings, mailly of Edinburgh scenes.  Some from the 1820s, some from the 1890s,  some others - includes many hand-coloured examples from the 1820s.   News from Edinburgh today  -  Events, Collections, Buildings and Gardens, Transport   This site includes     1. Post card portraits taken in studios in Edinburgh:    2. Post card views either takeen/published by Ediburgh photographers or views of Edinburgh, or both.y Edinburgh    Views of Edinburgh, grouped into three sections:     1. Street views:    2. Buildings:    3. Around Edinburgh   Views of transport around Edinburgh  -  Horse drawn trams and buses, cable cars, electric trams, buses and a few railway photos.  Also several maps of Edinburgh's bus and tram routes.   Summary of the updates added to this site each month since the site was launched   Frequently Asked Questions

 

 

 

The Wet Collodion Process

Thomas Rodger

Below are some extracts from Thomas Rodger's paper On Collodion Calotype,
 read to the Royal Scottish Society of Arts in Edinburgh in February 1854.

4

Coat the Plate

Pour the Collodion

"The next proceeding is to clean a plate of glass thoroughly, finishing it with a piece of chamois skin or silk, and then to cover one side of it with the prepared collodion, which I do in the following way: -

I fasten a cylindrical piece of gutta percha to the under side of the glass as a handle; and, holding by this the plate in  my left hand in a level position, I pour on the collodion from a small phial, in a steady and uninterrupted stream, upon the near right-hand corner of the  plate, at the same time altering its level so as to cause the collodion to transverse the whole surface, and then allow  the superfluity to run back into the bottle from the furthest right-hand corner to the plate."

Create an even Coating

"Next, I immediately give the plate a rotatory motion by means of the gutta percha handle, to render the coating equal, and, after the expiry of from ten to fifteen seconds, according to the temperature, I immerse the plate slantingly in a bath of nitrate of silver, at a strength of 35 grains of the crystallized nitrate to 1 ounce of pure water."

"I suspend it in this bath for forty seconds without lifting it, and then raise and re-immerse it three or four times at short intervals, or until the solution flows freely over the surface and the solution is free from the streaky and greasy appearance that it has at first."

"The prepared plate requires now to be dripped for a short time, and then exposed to the image in the camera."

Work in a Darkroom

"The window of the room in which the plate is rendered sensitive  by the bath, and in which the picture is afterwards to be developed, &c., requires to be covered by a double layer of yellow calico."

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The Wet Collodion Process - as described by Thomas Rodger Jun.

   

 

Links to Other Pages

EdinPhoto - Home Page      Please send me an e-mail ...  with your questions, comments, suggestions or news.      At any time, you can search for a word  -  perhaps a photographer's name or a photographic topic.  The search will produce a list of pages on the EdinPhoto web site where this word appears.            At any time, you can search for a word  -  perhaps a photographer's name or a photographic topic.  The search will produce a list of pages on the EdinPhoto web site where this word appears.

Photographs and Other Images  -  These include portraits of photographers  -  photographic outings -  Princes Street views  -  Newhaven Fishwives  -  etc.  Early Photography in Edinburgh  -  Talbot, Brewster, Hill & Adamson, Early Professional Photographers in Princes Street, etc.  Professional Photographers in Edinburgh  -  1840 to 1940  -  Their names, dates of business and studio addresses.  The Photographic Society of Scotland  -  1856 to 1873  -  Lectures, Exhibitions, Outings, etc.  The History of Edinburgh Photographic Society  -  1861 to date  -  Lectures, Exhibitions, Outings, Poems, etc.  EPS Publications - EPS Handwritten Records  -  Photographic Journals  -  Trade Directories  -  Books  -  etc.  Thanks to all who have encouraged and supported me in creating the EdinPhoto web site  -  including descendants of photogrpahers  -  researchers  -  providers of photographs and other material  Background notes on the research thal led up to the creation of this site  -   together with lists of new material added to the site since its launch.  Brief comments on how this site might be used  -  Just browsing?  -  Seeking specific information?  Please add your questions, suggestions or other comments to the Guest Book.  Links to other web sites  -  Photographic Societies  -  Photographic History  -  Family History  -  etc.  Click here to find the link to the Edinburgh Photogrpahic Society web site.  Details of who owns the copyright of photographs and other mateiral on this web site.

A selection of my photographs, many from Edinburgh throughout the year.   Also photos from Scotland, London, Iceland, Italy, Hong Kong and elsewhere    Many old maps of Edinburgh (Old Town, New Town, while City), Leith and Newhaven.  Includes several old transport maps and a comparison of old maps with recent aerial photos.   Old engravings, mailly of Edinburgh scenes.  Some from the 1820s, some from the 1890s,  some others - includes many hand-coloured examples from the 1820s.   News from Edinburgh today  -  Events, Collections, Buildings and Gardens, Transport   This site includes     1. Post card portraits taken in studios in Edinburgh:    2. Post card views either takeen/published by Ediburgh photographers or views of Edinburgh, or both.y Edinburgh    Views of Edinburgh, grouped into three sections:     1. Street views:    2. Buildings:    3. Around Edinburgh   Views of transport around Edinburgh  -  Horse drawn trams and buses, cable cars, electric trams, buses and a few railway photos.  Also several maps of Edinburgh's bus and tram routes.   Summary of the updates added to this site each month since the site was launched   Frequently Asked Questions

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