How To Use Bichromate In A Sentence
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You can change the color of the image by toning or applying gum bichromate emulsions to a finished platinum print.
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Greater contrast may be obtained by adding small amounts of a 5% solution of potassium bichromate.
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Most of these extracts contain the coloring matter in two states, the developed and the undeveloped, and an oxidizing mordant such as bichromate of potash causes the latter as well as the former to enter completely into combination with a metallic base; whereas many of the other mordants, such as alumina or tin compounds, merely take up the developed portion of the coloring matter together with such small and variable proportions of the undeveloped as might undergo oxidation during the process of dyeing.
Scientific American Supplement, No. 711, August 17, 1889
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This was the discovery of the 'black reaction' (reazione nera), based on nervous tissue hardening in potassium bichromate and impregnation with silver nitrate.
Life and Discoveries of Camillo Golgi
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This is carried out by boiling the wool in a solution of the metal, such as bichromate of potash, chrome alum or chrome fluoride when chrome is to be used as a mordant, with alum or sulphate of alumina when alumina is required to be deposited on the fibre, and with copperas when iron is to be the mordant.
The Dyeing of Woollen Fabrics
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_Yellow -- Rich: _ -- Work five pounds of goods one-half hour in a boiling bath with three ounces bichromate of potassa and two ounces alum; lift and expose till well cooled and drained; then work one-half hour in another bath with five pounds of fustic.
The Whitehouse Cookbook (1887) The Whole Comprising a Comprehensive Cyclopedia of Information for the Home
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Whether Daniel Burnham's jaunty skyscraper is better appreciated when lavished in gum bichromate and platinum is another matter.
From the Shadows of Giants
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The addition of alcohol to the bichromate bath — sometimes recommended to harden the film and allow it to stand a higher temperature, and to hasten the desiccation of the tissue — is objectionable, for the spirits tend to reduce the bichromate, which is transformed into the green salt, and, therefore, a partial or complete insolubilization of the gelatine is the result.
Photographic Reproduction Processes
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The chloroform, which is now free from alcohol and contains all the fusel oil, is treated with a solution of 5 grammes of potassium bichromate in 30 grammes of water and 2 grammes of sulphuric acid, and then heated in a closed flask for six hours on a water bath at 85°.
Scientific American Supplement, No. 365, December 30, 1882
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I was amazed by two finds: a self-portrait by Edward Steichen, a bichromate gum photograph which appears as a painting - Steichen manipulated the print with brush-strokes to add both white and black shades.
Chicago: days 2-5
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The addition of alcohol to the bichromate bath — sometimes recommended to harden the film and allow it to stand a higher temperature, and to hasten the desiccation of the tissue — is objectionable, for the spirits tend to reduce the bichromate, which is transformed into the green salt, and, therefore, a partial or complete insolubilization of the gelatine is the result.
Photographic Reproduction Processes
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_ -- Morphine and its acetate give an orange-red colour with nitric acid, becoming brighter on standing; decompose iodic acid, setting free iodine; with perchloride of iron, gives a rich indigo-blue; with bichromate of potassium, a green turning to brown.
Aids to Forensic Medicine and Toxicology
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Under the action of light the bichromate employed to sensitize the albumen is reduced into chromic oxide which render insoluble this organic substance — or any other, such as caseine, gelatine, gum arabic, etc.; therefore whenever the film is not acted on in its whole thickness, the subjacent part being still soluble, is necessary washed off and with it the superficial impressed part, that is, the image.
Photographic Reproduction Processes
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By oxidation with bichromate of potash and sulphuric acid, fusel oil yields valerianic acid, which is used in medicine, and apple-oil, employed as a flavoring ingredient in confectionery.
The Art of Perfumery And Methods of Obtaining the Odors of Plants
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It is obtained impure, as a by product, when for the preparation of valerianic acid, fusel-oil is distilled with bichromate of potash and sulphuric acid.
The Art of Perfumery And Methods of Obtaining the Odors of Plants
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Others have suggested that a mixture of egg white and bichromate produces a photosensitive mixture that works when painted on the linen.
The Shroud Codex
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The glycerol content is ascertained by taking 2.5 grammes, adding lead subacetate solution, and filtering without increasing the bulk more than is absolutely necessary; the solution is concentrated to about 25 c.c., and the oxidation with bichromate and sulphuric acid conducted as described in the examination of Crude Glycerine.
The Handbook of Soap Manufacture
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Into a pint gem-jar put water 10 parts, sulphuric acid 1 part, potass, bichromate 1 part.
Ontario Teachers' Manuals: Nature Study
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“Thus, for example,” says Robert Hunt, “if a slip of paper prepared with the ammonio-citrate of iron be exposed partially to sunshine, and then washed with the bichromate of potash, the bichromate is deoxidized and precipitated upon the sunned portion, just as it would be if directly exposed to the sun’s rays.”
Photographic Reproduction Processes
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_ -- Work for twenty minutes at 80° F. in a bath of 10 lb. fustic extract, 5 lb. quercitron extract, 2 lb. logwood extract; heat to boil, work for half an hour, then enter in a cold bath of 2 lb. sodium bichromate and 5 lb. copper sulphate; work for twenty minutes, then heat to boil; work for twenty minutes more, wash and dry.
The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student
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A systematic study was conducted to oxidation-reduction reaction of many kinds of small molecule alcohol with bichromate. A detailed analysis was conducted to reaction process.
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A few years ago I recommended carefully conducted dyeing trials on woolen cloth mordanted with bichromate of potash as the best and simplest mode adapted to such cases, and my subsequent experience enables me to confirm that observation to the fullest extent.
Scientific American Supplement, No. 711, August 17, 1889
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_ -- Morphine and its acetate give an orange-red colour with nitric acid, becoming brighter on standing; decompose iodic acid, setting free iodine; with perchloride of iron, gives a rich indigo-blue; with bichromate of potassium, a green turning to brown.
Aids to Forensic Medicine and Toxicology
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Toussaint used Lister's antiseptic, carbolic acid, called phenol today, rather than bichromate.
Pasteur's 'Private Science'
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The batteries of bichromate of potassium of the Tissandier brothers had given a speed of four yards a second.
Robur the Conqueror
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In an example, 0.5 gram of nitre was taken, and 59.4 c.c. of the "bichromate" solution were required.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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The bright yellow Lichen, growing on rocks and walls, and old roofs, dyes a fine plum colour, if the wool is mordanted first with Bichromate of Potash.
Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer
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When tartar, argol, oxalic acid, lactic acids and other assistants of an organic nature are used, then a different effect is obtained, the bichromate is completely decomposed, and a deposit of chromium oxide formed on the wool.
The Dyeing of Woollen Fabrics
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Then, too, some other chemical, such as bichromate of potassium, or ammonium chloride, may be used instead of dilute sulphuric acid.
General Science
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Chromates and bichromates have a commercial advantage over tellurites, being lower in cost.
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It was the shade of purple called mauve, and the chief agent in its production was bichromate of potash.
Scientific American Supplement, No. 470, January 3, 1885
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-- Among minor reagents suggested as purifying substances for acetylene may be mentioned potassium permanganate, barium peroxide, potassium bichromate, sodium plumbate and arsenious oxide.
Acetylene, the Principles of Its Generation and Use
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Mr. Thomson had further alluded to the color obtained with logwood or logwood extract and wool mordanted with bichromate of potash, and seemed to be under the impression that the color thus obtained was not black, but blue.
Scientific American Supplement, No. 711, August 17, 1889
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The oxidation of isosafrole is reaction with anhydride - acetone, anhydride - acetic acid, sodium bichromate - sulfuric acid and so on.
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A kind of chromium gel system of retarded crosslinking made of partially hydrolyzed polyacrylamide(HPAM), sodium bichromate and organic reductant sulfocarbamide was investigated.
