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In the 19th century, hot stamping became a popular method of applying gold tooling or embossing in book printing on leather and paper. [5] The first patent for hot stamping was recorded in Germany by Ernst Oeser in 1892. [2] From the 1950s onward, the method became a popular means of marking plastic . [4]
Heat: the ability to maintain a consistent heat level for the best impression. Die depth: the client's artwork or the engraver's efforts will initially determine the die depth, however, if by looking at the artwork it appears that an adjustment of the die depth may be necessary, the die may need to be retooled to achieve a greater depth.
The sheet is then tilted back and forth, rolling the powder across the image. The excess powder is then removed by raising the substrate to a vertical position and lightly tapping the back side. The powdered sheet is then fed into a radiant heating system (as above) at a speed that achieves a good-quality melted film.
Sheet metal embossing is a metalworking process for producing raised or sunken designs or relief in sheet metal. In contrast to coining (which uses unmatched dies), embossing uses matched male and female dies [ 1 ] to achieve the pattern, either by stamping , or by passing a sheet or strip of metal between patterned rollers . [ 2 ]
Once the main repoussé is done, the piece is again released by heating. The cavities on the back side, created by the repoussé work, are filled with melted pitch. Once that filling has hardened, the plate is again turned over and placed on top of a layer of softened pitch. Once the pitch has hardened, the design is then refined by chasing.
A heat gun is a preferred way to heat up the pitch (and, if necessary, the metal object). A powerful hair dryer could also work. A blow torch as used by plumbers may also be used, although it creates a fire hazard since the pitch (and any vapors it may release when hot) are flammable.
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Embossing (manufacturing), commercial scale embossing of sheet metal; Image embossing, the process to create highlights or shadows that will replace light/dark boundaries of an image; Leather embossing; Paper embossing, the raising of paper and other non-metal products using specific tools to accomplish the task
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