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

 

 

 

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.

7

Fix the Plate

Fix and Wash

"The development  being now completed, the picture must be thoroughly washed, by pouring a stream of water over it; and then it must be secured from the further action of light" [fixed] "and rendered more fit for transferring if a negative, by removing the yellow iodide of silver from the blanks and shadows of the picture."

For this purpose I use:

            -  Cyanide of potassium (crude cakes), 120 grains

            -  Water (common), 8 ounces.  Dissolve."

"After allowing this solution to remove the whole of the spare iodide of silver, the picture is again submitted to a thorough washing, and allowed to dry spontaneously, by a gentle heat."

Varnish

"As the collodion is liable to be scratched by the paper or otherwise in copying, it is better to be coated with varnish to prevent this, especially if it is to be frequently copied. 

The varnish used for this purpose is comprised of -

            -  Gum damar 1.5 or 2 drams.

            -  Mineral naphtha, 4 ounces."

Intensify (if necessary)

"After the picture has been fixed, and CAREFULLY washed, from  cyanide of potassium, I pour over it a quantity of the negative developing solution, diluted with an equal bulk of water."

"Upon this is poured a quantity of a solution of nitrate of silver, in the proportion of 15 grains to 1 ounce of water, and I continue to keep the plate in motion for a time."

"If the image is made strong enough by a single applicaton, it is well;  but if not, a little more nitrate solution and developing liquid should be applied till the desired pitch is obtained."

"After this, the plate must be well washed, and again submitted for an instant to the cyanide of potassium, and finally washed  thoroughly."

BACK:

THIS PAGE:

NEXT PAGE:

 

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

Let the cursor hover over any of the buttons above and it will display further details.

LINKS:  All underlined words and pictures on this site are links.  Please click on any of them..