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The hectograph, gelatin duplicator or jellygraph is a printing process that involves transfer of an original, prepared with special inks, to a pan of gelatin or a gelatin pad pulled tight on a metal frame. [1] While the original use of the technology has diminished, it has recently been revived for use in the art world.
The hectograph introduced in 1876 or shortly before, was a technology in which a dye-impregnated master copy, not unlike a spirit master, was laid on top of a cake pan full of firm gelatin. After the dye soaked into the gelatin, sheets of paper could be laid on top of the gelatin to transfer the image. This was good for 50 copies at most.
Gelatin is used as a binder in match heads [39] and sandpaper. [40] Cosmetics may contain a non-gelling variant of gelatin under the name hydrolyzed collagen (hydrolysate). Gelatin was first used as an external surface sizing for paper in 1337 and continued as a dominant sizing agent of all European papers through the mid-nineteenth century. [41]
Bromangelon was a gelatin dessert popular in the late 19th century and early 20th century. It was invented around 1895 by Leo Hirschfeld, who would later invent the Tootsie Roll . Bromangelon is regarded as the first commercially successful gelatin dessert powder, [ 1 ] having been mass-marketed several years before Jell-O , which would ...
Gelatin was sold in sheets and had to be purified, which was time-consuming. Gelatin desserts were the province of royalty and the relatively well-to-do. In 1845, a patent for powdered gelatin was obtained by industrialist Peter Cooper, who built the first American steam-powered locomotive, the Tom Thumb.
Gelatin is a main ingredient. Candies like Snickers, Skittles, Starbursts, and marshmallows have also fallen victim to the gelatin trap (I know, I'm crying too).
It is then soaked in warm water to dissolve the unhardened portion of the gelatin. The resulting relief image is pressed into a thick sheet of lead under about 5000 pounds per square inch of pressure. This creates an intaglio metal printing plate, which is used as a mold. It is filled with liquid pigmented gelatin and a sheet of paper is then ...
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