Facts About Processes, Pigments, And Vehicles : a Manual for Art Students
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In our eReader you can find the full English version of the book. Read Facts About Processes, Pigments, And Vehicles : a Manual for Art Students Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Facts About Processes, Pigments, And Vehicles : a Manual for Art Students
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To quickly assess the difficulty of the text, read a short excerpt:
If he wished to reproduce a black-and- white drawing he would do so in the same way, by placing it before the camera, obtaining a negative of it, and then ' printing ' off copies in the way described.
This, however, would be a tedious and expensive method of going to work, and consequently much ingenuity has been spent in devising methods whereby the action of the light can be made use of to obtain an engraved block of the original drawing which can be placed in the printing press, and used to ...reproduce the drawing over and over again. It was also necessary to devise a process which could produce an impression of such a character that it could be set up and printed off along with ordinary type.
There are many different methods of obtaining this result, but a very large number of them are based upon a peculiar property of a film of gelatine, or albumen, or bitumen, when exposed to light under certain conditions.
For instance, it has been found that if a film of gelatine Digitized by Google 84 PROCESSES, PIGMENTS, AND VEHICLES is first steeped in a solution of * bichromate of potash ' and then exposed to light, it becomes insoluble in hot water.
What to read after Facts About Processes, Pigments, And Vehicles : a Manual for Art Students?
You can find similar books in the "Read Also" column, or choose other free books by Laurie, A. P. (Arthur Pillans), 1861-1949 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
If he wished to reproduce a black-and- white drawing he would do so in the same way, by placing it before the camera, obtaining a negative of it, and then ' printing ' off copies in the way described.
This, however, would be a tedious and expensive method of going to work, and consequently much ingenuity has been spent in devising methods whereby the action of the light can be made use of to obtain an engraved block of the original drawing which can be placed in the printing press, and used to ...reproduce the drawing over and over again. It was also necessary to devise a process which could produce an impression of such a character that it could be set up and printed off along with ordinary type.
There are many different methods of obtaining this result, but a very large number of them are based upon a peculiar property of a film of gelatine, or albumen, or bitumen, when exposed to light under certain conditions.
For instance, it has been found that if a film of gelatine Digitized by Google 84 PROCESSES, PIGMENTS, AND VEHICLES is first steeped in a solution of * bichromate of potash ' and then exposed to light, it becomes insoluble in hot water.
What to read after Facts About Processes, Pigments, And Vehicles : a Manual for Art Students?
You can find similar books in the "Read Also" column, or choose other free books by Laurie, A. P. (Arthur Pillans), 1861-1949 to read onlineMoreLess
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