Important: Safety Warning
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.
In addition, this page directs the use of hazardous substances — such as benzine, gasoline, lye, or strong acids — for household tasks. These materials are highly flammable, corrosive, or poisonous, and the practices described have caused fires, burns, and poisonings.
This information has been left in for historical purposes but should not be acted upon.
Bronzing
Chinese Bronze
Take 2 ounces This is the process each verdigris and vermilion; 5 ounces each of giving a bronze-like or an antique alum and sal-ammoniac…
Brown Bronzes for Medals, copper tea-urns
3777. Carbonate of Iron Bronze. &c. Take a wine-glass of water, and add to it 4 or 5 drops nitric acid; with this solution Beautiful tints…
Black Bronzes
A very dark colored bronze may be obtained by using a
Bronzing with Crocus
Make little sulphuretted alkali (sulphuret of ama thin paste of crocus and water lay this monia is best). The face of the medal is ).. The…
Bronzing with Black-Lead
to remain on for about 12 or 15 minutes, After the medal has been well cleaned from wiping it off with a linen…
Plumbago Bronze
This bronze is obtained by brushing the surface of the medal with plumbago, then placing it on a clear fire till it is made too hot to be…
French Bronze
An eminent Parisian sculptor makes use of a mixture of + ounce sal-ammoniac, ounce common salt, 1 ounce spirits of hartshorn, and 1…
Fine Green Bronze
Dissolve 2 ounces verdigris and 1 ounce sal-ammoniac with a solution of sulphuret of potassium,
Antique Bronze
Rub the medal Antique Bronze. Rub the medal in 1 pint vinegar, and dilute the mixture then dry. This produces the appearance of with water…
To Bronze Iron Castings
Greenish Grey and Violet Tint. An cleaning (see No. 3641) and subsequent imorange tint, inclining to gold, is produced by mersion in a…
Moire Bronze
A moire appearance, vastly superior to that usually seen, is produced by boiling the object in a solution der may be placed in a little bag…
To Bronze Paper
Paper is little gum and water, and afterwards burnishbronzed by mixing the powders up with a ing. The paper used should contain sufficient…
Beautiful Red Bronze Powder
3809. Bright Red Bronzing for Cop- Mix together sulphate of copper, 100 parts; carbonate of soda, 60 parts; apply heat until they unite…
Gold Colored Bronze Powder
3810. Dark Red Bronzing for Copper. Dissolve 1 drachm sulphur, and 1 ounce pearlash, in 1 pint water.
Dark Grey Bronzing for Zinc
Mix 1 drachm protochloride of tin, and 1 drachm sulphocyanide of potassium, with 1 Verdigris, 8 ounces; tutty powder, 4 ounces; pint water…
Green-Grey Bronzing for Zinc
Dissolve 1/2 drachm muriate of iron in 1 pint water.
Silver White Bronze Powder
Melt together 1 ounce each bismuth and tin, Use then add 1 ounce running quicksilver; cool garancine (madder-red) infusion boiling hot. and…
Graham's Quick Bronzing Li- Zinc
Agitate the articles in a solution of 8 quids. The following 19 receipts are prepara- drachms sulphate of copper, and 8 drachms tions for…
Red-Brown Bronzing for Brass
Dissolve 1 ounce nitrate of copper, and 1 as represented in Fig. I, No. 3665. This, it will be seen, induces a galvanic current, and is…
Purple Eronzing for Zinc
Immerse in a boiling infusion of logwood. 3817. Larkin's Bronzing Fluids for Alloys of a Silvery-Grey Color. Mr. Larkin states that, for…
Red Bronzing for Brass
Mix 30 grains tersulphite of arsenic, 6 drachms solution of pearlash, and 1 pint water. of any solution of copper. The hydrochlorate of…
Orange Bronzing for Brass
Mix 1 drachm potash solution of sulphur with 1 pint water. 3805. Slate-Colored Bronzing for may have been rubbed off. These new alloys…
Blue Bronzing for Brass
Mix 20 drachms hyposulphite of soda with 1 pint water. 3807. Steel-Grey Bronzing for Brass, or Copper. Mix 1 ounce muriate of arsenic with…
Blackish Bronze Coloring
For giving silvery-grey alloys a blackishbronze color, they are treated with a solution of hydrochlorate of copper diluted with a…
Antique Bronze Coloring
To comes firmly attached. Probably, in the case impart a brass or antique bronze color, either of porcelain, biscuit, or stoneware, some a…
Drab Bronze for Brass
Brass obtains a very beautiful drab bronze by being worked in moulders' damp sand for a short time and brushed up.
Browning for Gun Barrels
Mix 1 ounce each aqua-fortis and sweet spirits of nitre; 4 ounces powdered blue vitriol; 2 agitate until dissolved. ounces tincture of…
To Make Bronzing for Wood
Grind separately to a fine powder, Prussian blue, chrome yellow, raw umber, lampblack, and clay, and mix in such proportions as will…
Separating Funnels
These are are used for separating mixed fluids of different densities. The mixed liquid is poured in-
To Bronze Wood
First coat the clean wood with a mixture of size and lampblack; then apply two coats of the green colored sizing in the last receipt; and…
Pipettes
These are glass instruments used for measuring liquids in drops, and so constructed that the flow of the liquid from them is under the…
To Filter Corrosive Liquids
Strong acids, &c., are filtered through powdered glass or siliceous sand, supported on pebbles in the throat of a glass funnel, or through…
To Filter Precipitates
When filtration is employed to separate precipitated matter from the solution in which it is suspended, the filtering medium should be such…
Goniometer
An instrument cases a liquid will not readily become transused for measuring the angles of crystals. parent by simply passing through the…
To Filter Vegetable Juices
the fluid pass clear. These powders should These should be allowed to deposit their fecu- not be in too fine a state of division, nor used…
Self-Feeding Filter
It is usually a matter of more or less importance in filtration, that the filter should be kept full. To effect this requires unremitting…
Chemical Washing
When precipitation takes place, the deposit requires to undergo edulcoration, or cleansing from the liquid from which it was precipitated…
Chemical Drying
In order to deprive chemical substances of water or moisture, the simplest means is evaporation. This may be performed either by merely…
Decarbonization
This operation is performed on cast iron, to convert it into steel or soft iron. The articles to be decarbonized are packed in…
Decoloration
The blanching cr rises sufficiently to reach to and close the end loss of the natural color of any substance. of the tube a, cutting off…