 Photographic copies in bichromated gelatine, from delicate line engravings, have been thus faithfully reproduced on glass. In photographic pictures in gelatine, taken from nature, the lights and shadows produce films of gelatine of different degrees of...  Annual Report - Стр. 1811873Полный просмотр - Подробнее о книге
 | Alfred Ely Beach - 1872 - Страниц: 434
...shadows produce films of gelatine of different degrees of thickness. A carefully regulated sand-blast will act upon the glass beneath these films more or...proportion to the thickness of the films, and the half tones or gradations of light and shade are thus produced on the glass. If we apply the sand-blast... | |
 | 1875 - Страниц: 854
...shadows produce films of gelatine of different degrees of thickness. A carefully-regulated sand-blast will act upon the glass beneath these films more or...less powerfully in proportion to the thickness of the film, and the half-tones or gradations of light and shade are thus produced on the glass. If we apply... | |
 | Alfred Ely Beach - 1872 - Страниц: 422
...these films more or less powerfully in proportion to the thickness of the films, and the half tones or gradations of light and shade are thus produced on the glass. If we apply the sand-blast to a cake of brittle pitch or resin on which a picture has been produced by photography... | |
 | 1875 - Страниц: 822
...upon the glass beneath the film more or less powerfully in proportion to the thickness of the film ; and the half-tones, or gradations of light and shade, are thus produced on the glass. And in the matter of the house-front, the blast instantaneously removes soot or dust from all crevices... | |
 | John Henry Pepper - 1877 - Страниц: 764
...shadows produce films of gelatine of different degrees of thickness. A carefully regulated sand-blast will act upon the glass beneath these films more or...shade are thus produced on the glass. If we apply the sand-blast to a cake of resin on which a picture has been produced by photography in gelatine, or drawn... | |
 | Park Benjamin - 1880 - Страниц: 1002
...different degrees of thickness. Л carefully-regulated sand-blast will act upon the glass beneath theso films more or less powerfully, in proportion to the thickness of the film, and the half-tones or gradations of light and shade arc thus produced on the glass. One of the... | |
 | 1874 - Страниц: 950
...shadows produce films of gelatin of different degrees of thickness. A carefully regulated sand-blast will act upon the glass beneath these films more or...proportion to the thickness of the films, and the half tones or gradations of light and shade are thus produced on the glass. If the sandblast is applied... | |
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