Etched

(imp. & p. p.) of Etch

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• This plate is etched--a flat proof, so called, is pulled on a hand press--and it is then taken up by the re-etcher. 佚名. 神奇的知识之书.
• The idea is to break up the surface into various sized dots, as the various gradations of color on the original cannot be transferred by any other method to a sheet of copper and etched. 佚名. 神奇的知识之书.
• Trade-mark etched. 佚名. 神奇的知识之书.
• A third specimen was an impression on paper, _printed from a photograph on metal_, the picture having been etched into the plate by nitric acid, and then printed from. 弗雷德里克·科利尔·贝克维尔. 伟大的事实.
• When the operation is reversed, and only the _darks_ are etched in _intaglio_, to be filled with ink, as in copper-plate engraving, it is called photo-gravure. Edward W. Byrn. 十九世纪发明进展.
• The etched disc is then electrotyped to form a matrix, and from this electrotype hard rubber duplicates of the original record are molded, which are capable of giving 1,000 reproductions. Edward W. Byrn. 十九世纪发明进展.
• A picture is thus produced on a metal plate, and the blank spaces are etched out by acid, leaving the lines in relief as printing surfaces. Edward W. Byrn. 十九世纪发明进展.
• Before the degrees are etched on the thermometer the open end of the tube is sealed. 伯莎M.克拉克. 科学通论.
• The disc, when completed, is then rinsed off and etched with acid, chromic acid being used, to prevent liberation of hydrogen bubbles. Edward W. Byrn. 十九世纪发明进展.

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