 If, then, the process have been successful, a perfectly black positive picture is at once developed. At first it most commonly happens that the whole picture is sooty or dingy to such a degree that it is condemned as spoiled, but on keeping it between...  Journal of the Franklin Institute - Seite 1371845Vollansicht - Über dieses Buch
 | 1844 - 564 Seiten
...term which is often marked by the appearance of a feeble positive picture, of a bright yellow hue, on the pale yellow ground of the paper. A long time...and clearness, and acquires the exact effect of a copper-plate • So commonly called, and sold as such, but their chemical names would be ferro-tartrate... | |
 | Perry Fairfax Nursey - 1844 - 504 Seiten
...hours. In this state the picture is to be very thoroughly rinsed and soaked in pure warm water, ana then dried. It is then to be well ironed with a smooth...and clearness, and acquires the exact effect of a copper-plate * So commonly called, and sold as such, hut their chemical names would be ferro-tartrate... | |
 | 1844 - 508 Seiten
...between the leaves of a book, especially in a moist atmosphere, by extremely slow degrees this dingiuess disappears, and the picture disengages itself with...and clearness, and acquires the exact effect of a copper-plate • So commonly called, and sold as such, but their chemical names would be ferro-tartrate... | |
 | Charles W. Vincent, James Mason - 1845 - 328 Seiten
...the action, and it is often complete in a few hours. In this state the print is very thoroughly to be rinsed and soaked in pure warm water, and then dried....increasing sharpness and clearness, and acquires the rxact effect of a copper-plate engraving on a paper more or less tinted with pale yellow. I ought to... | |
 | British Association for the Advancement of Science - 1845 - 718 Seiten
...very thoroughly rinsed and soaked in pure warm water, and then dried. It is then to be well-ironed with a smooth iron, heated so as barely not to injure...and clearness, and acquires the exact effect of a copper-plate engraving on a paper more or less tinted with pale yellow. I ought to observe, that the... | |
 | Henry Hunt Snelling - 1849 - 174 Seiten
...to injure the paper, placing it, for greater security against scorching, between clean smooth paper. If then the process have been successful, a perfectly...and clearness, and acquires the exact effect of a copper-plate engraving on a paper more or less tinted with a pale yellow. I ought to observe, that... | |
 | Samuel Dwight Humphrey - 1849 - 154 Seiten
...placing it, for better security against scorching, between smooth clean papers. If then the process has been successful, a perfectly black positive picture...and clearness, and acquires the exact effect of a copper-plate engraving on a paper more or less tinted with pale-yellow. I ought to observe, that the... | |
 | Robert Hunt - 1853 - 356 Seiten
...a term which is often marked by the appearance of a feeble positive picture of a bright yellow hue on the pale yellow ground of the paper. A long time...and clearness, and acquires the exact effect of a copper-plate engraving on a paper more or less tinted with pale yellow. the same action of the light,... | |
 | Robert Hunt - 1852 - 380 Seiten
...a term which is often marked by the appearance of a feeble positive picture of a bright yellow hue on the pale yellow ground of the paper. A long time...and clearness, and acquires the exact effect of a copper-plate engraving on a paper more or less tinted with pale yellow. " I ought to observe, that... | |
 | Robert Hunt - 1854 - 458 Seiten
...clean smooth papers. If then the process have been successful, a perfectly black, positive picture is developed. At first it most commonly happens that...and clearness, and acquires the exact effect of a copper-plate engraving on a paper more or less tinted with pale yellow. I ought to observe, that the... | |
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