The Art of the Photogravure
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Process
Preparing the Plate
Preparing the Image
Transferring the Image to the Plate
Etching the Plate
Printing the Gravure
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The Photogravure Process
Preparing the Image
HILE THE PLATE IS BEING READIED, the image is also prepared. A positive transparency is made from either an original negative or a copy negative. This film positive, which must be made the size desired for the final print, is then contact-printed under ultraviolet light to a gelatin-coated paper (known as carbon tissue) which was previously made light sensitive by soaking it in a solution of potassium bichromate, then dried.

The tissue and positive prior to exposure
In this process, the action of the light through the film positive changes the melting temperature of the gelatin. Areas exposed to light have a higher melting temperature and are said to be "hardened" and less exposed areas stay the same.



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