Important: Safety Warning
This page contains instructions involving gunpowder or other explosive or pyrotechnic compositions. Preparing explosives as described has caused severe injuries and deaths, and is illegal in most places.
In addition, this page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
Photography
Photography (APOTHECARIES' weight is used)
APOTHECARIES' weight is used throughout this article. In case of liquids the abbreviation oz. signifies fluidounce.
Cotton
To make Pyroxyline or Gun-cotton, suitable for Photographic Collodion. 1. By nitre process: Oil of vitriol (s. g. 1.70), 6 oz,; dried…
Paper Prints (Collodion which otherwise)
of collodion, which otherwise might be washed on to the image by the varnish, and produce a spot. To Adjust Camera for Chemical Focus.
Paper Prints (Albuminized Paper)
Albuminized Paper. Formula 1.-Take of chloride of ammonium, 200 grs.; water 5 oz.; albumen, 15 oz.
Photographic Printing (Ordinary phosphate of soda grs)
ordinary phosphate of soda, 20 grs.; distilled wa- | waving the dish meanwhile backwards and forter, 2 oz. Examine the chloride of gold…
Photographic Printing (Sensitive papers ought not)
Sensitive papers ought not to be exposed in the frame until they are quite dry. The shutter at the back of the frame is removed, and the…
Russell's Tannin Process, Modified
Cleaning the Plate. In order to clean the plates, make a stock solution of 2 oz. of bichromate of potash, 2 oz. of sulphuric acid, and 1…
Fothergill's Dry Process
The directions for coating and dipping in the bath are the same as for "Russell's Process." After removing the stereoscopic plate from the…
Taupenot's and the Wothlytype Processes
arranged the yellow light so that it falls nicely | the albumen and pour it on and off twice to disupon the surface of the film, hold it…
Cess
Cleaning the Glasses. place the surface water of the washed collodion film. Then apply a second quantity. Stand the albuminized plates…
Pictures on Porcelain
The plates for these pictures are sold as porce. lain, but are really an opaque white glass. The plate is coated with collodion, rendered…
The Wothlytype Process
I. To Prepare the Uranic Salt. Dissolve the ordinary commercial nitrate of uranium in distilled water; add ammonia till no more precipitate…
Photography (To a saturated solution)
To a saturated solution of the above salt in 6 oz. of distilled water add 220 grs. of nitrate of silver, previously dissolved in 1 oz. of…
Photography Without a Nitrate Of
SILVER BATH. (Sayce's process.) Preparation of Collodion. of ammonium, 2 grs.; soluble cotton, 6 grs.; ether Take of bromide of cadmium, 6…
Recovery of Silver, Gold, Etc
The image should very soon appear, and may be developed until the shadows become slightly tinged. Then wash the surface and back of the…
Failures and Imperfections
On Glass. 1. Universal clouding from over exposure or diffused light in preparation or development of the plate, or alkalinity of the bath…
Waste Solutions
Baths of Nitrate. Throw down the silver as a chloride by muriatic acid; settle, pour off the clear part, and wash the precipitate; place…
Phic Process (From a negative on glass)
From a negative on glass or paper a positive impression is taken on paper prepared in the following manner: Take sized paper, very smooth…
Phic Process (Let us suppose that a map has)
Let us suppose that a map has been compiled and drawn with great care, and that it is desired to multiply copies of this original in the…