Polygraphy (or Autography) was Hercule Florence’s first major print-related invention. The printing method was developed after experiencing some issues when printing his article on the “animal voices”, the Zoophony.
Hercule studied the scientific literature of the time on polyantography, engraving and lithography in the Archives des Découvertes et Inventions Nouvelles, which helped him develop polygraphy, a project to which he would devote himself for the remainder of his life.
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In contrast to the time-consuming and expensive methods of letterpress and lithography, in 1831 Florence proposed using a wax plate as a matrix, and an ink of a denser consistency. This allowed him to print without the need for a large, heavy press.
After some years of experiments – which he conducted alongside his research on Photography – Hercule Florence succeeded in making polygraphy print all colors simultaneously, which represented a significant technical advancement over traditional engraving. Later, in 1838, as a result of this technique, he created the Inimitable Paper. Although used for small-scale commercial printing (pharmacy labels, advertisements), the method was never promoted or sold.
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