The British Journal of Photography, 第 14 巻H. Greenwood, 1867 |
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acetic acid albumen alcohol ammonia appearance applied artist bath beautiful better bichromate BRITISH JOURNAL camera carbon carbon printing Carey Lea chemical chloride coating collodion collodion process colour copy correspondent dark described developer dissolved drachms dry plates effect employed engraving exhibited experiments exposed exposure film fixed focus gallic acid gelatine give glass glycerine grains hyposulphite of soda inches iodide of silver iodine iron JOURNAL OF PHOTOGRAPHY lens lenses light London Photographic Society magnesium matter means metal method minutes negative nitrate of silver nitric acid O. G. Rejlander object obtained operation ordinary ounce paper perfect picture portrait prepared present prints produced purpose pyrogallic pyrogallic acid quantity remarks render salt sensitised sensitive solution South London specimens spherical aberration sufficient sulphocyanide surface taken tannin tion transparent varnish W. H. Davies washing
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77 ページ - Oscuro, or otherwise, or in any other Manner copy in the Whole, or in Part, by varying, adding to, or diminishing from, the main Design...
258 ページ - ... bichromate with organic matter, and applying this new mixture or combination to the paper or other fabric or surface. The photographic impression is produced upon this prepared surface by the action of light passing through a negative photographic picture, or an engraving, or other suitable object, or screen, or in the camera obscura, and it is then washed with a sponge and a large quantity of water. The albumen or other organic matter is rendered insoluble at the parts where it has been acted...
257 ページ - The portion covered by the object retains the original bright yellow tint which it had before exposure, and the object is thus represented yellow upon an orange ground, there being several gradations of shade or tint according to the greater or less degree of transparency in the different parts of the object. " In this state, of course, the drawing, though very beautiful, is evanescent. To fix it, all that is required is careful immersion in water, when it will be found that those portions of the...
77 ページ - An Act for the Encouragement of the Arts of designing, engraving, and etching historical and other Prints, by vesting the Properties thereof in the Inventors or Engravers during the Time therein mentioned...
213 ページ - ... of silver. Keep this liquor in a glass decanter well stopped. Then cut out from a paper the letters you would have appear, and paste the paper on the decanter, which you are to place in the sun, in such a manner that its rays may pass through the spaces cut out of the paper, and fall on the surface of the liquor. The part of the glass through which the rays pass will turn black, and that under the paper will remain white. You must observe not to move the bottle during the time of the operation.
77 ページ - And whereas Printsellers and other Persons have of late, without the Consent of the Inventors, Designers, and Proprietors of such Prints, frequently taken the Liberty of copying, engraving, and publishing, or causing to be copied, engraved, and published, base Copies of such Works, Designs, and Prints, to the very great Prejudice and Detriment of the Inventors, Designers, and Proprietors thereof...
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