Important: Safety Warning
This page contains a formula or preparation using substances now known to be dangerously toxic, such as arsenic, mercury, lead, or cyanide compounds. Exposure to these substances can cause severe poisoning, permanent injury, or death.
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
To Sprinkle Books
Take a stiff brush made of hogs' bristles, perfectly Photography. Photography is based upon the law or principle that clean, dip it in the…
Orange Sprinkle for Books
Color the edge with King's yellow, mixed in weak gum-water, then sprinkle with vermilion mixed in the same manner. to 3154 is contributed…
Papier Saxe for Photography
The best is the papier saxe, an article made expressly for photography, and may be ob-
Soap Marble for Books
This is applicable for marbling stationery, book tained from any dealer in photographic maedges, or sheets of paper for ladies' fancy…
To Make the Paper Sensitive
Having prepared the silver solution as above directed, take the paper by opposite corners, smooth side down if plain paper, glazed side if…
To Copy an Object
Having prepared, in a dark room, a sheet of paper as above, lay it upon a piece of glass; place upon the glass a leaf as translucent as can…
To Tone a Picture
The print is now taken by two corners and immersed in the gold or toning bath. At first the print will begin to bleach, and turn a warm red…
To Prepare a Fixing Bath
phite of soda. Cyanide of potassium acts Take water, 6 ounces; hyposulphite of soda, more energetically, but is a very dangerous 1 ounce…
Precautions to be Observed in light
The chemicals used to produce it are Making a Picture. When directions are also combinations of the salts of silver, but given to prepare…
To Develop a Negative
This is done by removing the plate from the holder, and, holding the plate in a horizontal po-
Collodion for Photography
sition, flowing it with the developing solu- Collodion is the vehicle by which the phototion. (See No. 3151.) If properly timed or graphic…
To Varnish a Negative
The varnish (see No. 3153) is flowed on and off preparation of collodion the proportion of 1 precisely as with the collodion. (See No…
To Re-develop a Negative
This is done by pouring upon the plate about 1 ounce of the pyrogallic acid solution to which has been added 5 or 6 drops of the silver…
Glass for Photography
For in a room of evenly diffused light the iodide portraiture and ordinary landscape photo- of cadmium as the principal excitant gives…
Silver Bath
Make a solution in allowed to remain in water for at least half an the proportion of 60 grains nitrate of silver to hour previously to its…
Developing Solution
This were soaked for 2 days in a bath of sulphate of may be made in stock solution of the simple copper, when the picture was found to be…
Tapioca Paper
To prepare tapioca paper, which is very useful for copying photographs by artificial light, 200 grammes (6) Troy ounces) of tapioca are the…
To Enamel Cameo Pictures
a syphon, and reserve the residue. If the Ordinary well polished glass plates are coated bottle has become partially filled in course of…
Preservation of Photographs
that, for photographic purposes, both solutions must be evaporated in a water-bath until the excess of acid has been volatilized, when they…
Simple Method of Copying II
Cooper, Jr., of England, gives the follow- Drawings, Etc. Silvered albumen paper, ing formula for a preservative varnish which after being…
Lea's Solution for Cleaning camera
Develop the image by brushing Photographic Glasses. Water, 1 pint; over it the following powder: Oxide of cobalt, sulphuric acid, 1/2…
Bromide Paper
Soak the paper dried, and washed; then the metallic silver to 1 ounce); then brush it over with strong may be obtained from it by the…
Chromatype Paper
Simple mass of a gray color; after washing, this may Soak the paper in the simple solution (see No. be dissolved in nitric acid and…
Paper for Photography
The paper used for photography may be the finest satin post paper, of uniform texture, free from the maker's mark, specks, and all…
Cyanotype Paper
Brush the of iron. Expose the paper over with a solution of ammonio-citrate then wash it over with & solution of ferropaper in the usual…
Simple Nitrated Paper
This is merely paper brushed over with a strong solution of nitrate of silver. In brushing over the paper it must not be crossed. Its…
Crysotype Paper
Wash the wine instead of water. This "paper only iron , dry it, and afterwards brush it over with requires washing in water to fix the…
Muriated Paper
The paper is it in a dark room. The image is brought out first soaked in solution of common salt, by brushing it ove) with a neutral…
Calotype Paper
The paper is poli. The plates are to be rubbed hard and saturated in 1 ounce water, containing 20 evenly with balls of cotton-wool dipped…
Instantaneous Positive Paper
Mix 6 drachms of a saturated solution of undecompounded bodies, which are bichloride of mercury with 1 pint distilled water. Float the…
Prepared Wax Paper
Make which it is introduced into the furnace. The a strong size by digesting 25 parts gelatine, cupel is a…
Barytic Photographic Solution
Dissolve 35 grains chloride of barium in 2 ounces distilled water. bone ashes or burnt bones. At the British mint the cupels are made of…
Assay of Gold by Cupellation
This process is divided into five operations. Cupellation. Either 6 or 12 grains of the alloy is the weight usually taken for the assay, to…
Grain Gold
Cupelled gold, 1 part; silver, 3 parts; melt and pour in a small stream into water; dissolve out the silver performed by adding 3 parts of…
To Color Gold
Take 1 part salt, 1 part alum, and 2 parts saltpetre; each material to be well pounded separately in a Weighing. The pure gold is next…
Gold Coloring Solution
Take 1 ounce nitrate of soda, and 1/2 ounce chloride of sodium, and dissolve in a slight excess of If 100 grains of the substance or liquid…
To Clean Gold
Dissolve a little muriate of ammonia in urine; boil your soiled gold therein, and it will become clean and brilliant.
To Clean Gold Ornaments
Gold ornaments may also be thoroughly cleaned by immersion for a few seconds in a weak solution of ammonia. Then wash with soap and water…