Journal of the Asiatic Society of Bengal, 47권,1-4호Asiatic Society of Bengal, 1878 |
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70 페이지
... bichromate forms the sensitive surface and yields prints which , for all practical purposes , may be considered perfectly permanent . Silver - printing - Notwithstanding its expensiveness and the want of permanence of the prints ...
... bichromate forms the sensitive surface and yields prints which , for all practical purposes , may be considered perfectly permanent . Silver - printing - Notwithstanding its expensiveness and the want of permanence of the prints ...
76 페이지
... bichromates , on gelatine , gum , albumen and other colloid substances under the influence of light , whereby these ... bichromate of potash , and this is sometimes the best method , because the paper will not keep good for long in its ...
... bichromates , on gelatine , gum , albumen and other colloid substances under the influence of light , whereby these ... bichromate of potash , and this is sometimes the best method , because the paper will not keep good for long in its ...
78 페이지
... bichromate of potash in water , to which some alcohol may be added with advantage , especially in hot climates ; the bath should also be cooled down with ice if its temperature exceeds 65 ° . The tissue is then carefully dried , and ...
... bichromate of potash in water , to which some alcohol may be added with advantage , especially in hot climates ; the bath should also be cooled down with ice if its temperature exceeds 65 ° . The tissue is then carefully dried , and ...
82 페이지
... bichromate of potash be spread upon a suitable support and when dry exposed to light , then again moistened and inked in with a roller charged with printing ink , the ink would only take upon the parts altered by the light , and thus ...
... bichromate of potash be spread upon a suitable support and when dry exposed to light , then again moistened and inked in with a roller charged with printing ink , the ink would only take upon the parts altered by the light , and thus ...
83 페이지
... bichromate , of becoming insoluble and repellent of water under the influence of light . The procedure , too , is much the same as in the simple pigment - printing process , except that , instead of the fatty ink which forms the image ...
... bichromate , of becoming insoluble and repellent of water under the influence of light . The procedure , too , is much the same as in the simple pigment - printing process , except that , instead of the fatty ink which forms the image ...