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22 Jul 1869 Jahr - Hectograph (A.K.A Jellygraph/Gelatin Duplicator) was invented

Beschreibung:

A printing process that transfers something prepared with a special ink, to a pan of gelatin.

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History of printing

16 Okt 2017

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502

Datum:

22 Jul 1869 Jahr

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~ 156 years ago

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