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The helmet is elaborately decorated; a winged dragon on the face plate soars upwards to confront a two-headed dragon running along the crest, [115] while embossed foil sheets of tinned bronze, forming five different designs, cover nearly the entire helmet. [116]
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]
After the rollers, the two sheets are separated, which produces foil with one shiny side and one matte side. The two sides in contact with each other are matte, and the exterior sides become shiny. The reflectivity of dull aluminium foil is 80%, while shiny embossed foil reflects about 88%. [7]
Combination embossing is the process of embossing and foil stamping the same image. It involves imprinting and aligning foil over an embossed image to create a foil emboss. A sculptured die, generally made of brass is used for this procedure. The process requires close registration that must be controlled to keep the image and foil matched ...
The same procedure is used to make printed circuit boards, foil-stamping dies and embossing dies. It is also used to make nameplates, commemorative plaques and other decorative engravings. It can be used to make flat springs, levers, gears and other practical components that would otherwise be fabricated from sheet metal by cutting, drilling ...
The alternative to pressing gold sheet into a die is to work it over a design in cameo relief. Here the detail would be greater on the back of the final design, so some final chasing from the front was often carried out to sharpen the detail. The use of patterned punches dates back to the first half of the 2nd millennium BC, if not far earlier ...
The foil is then laminated onto a thin sheet of card stock that has been coated with a thick layer of wax. The heated lamination press has the Dufex embossing plate on its upper platen, which has been engraved with 'lenses' at different angles, designed to match the artwork and reflect light at different intensities depending on angle of view.
Transparencies can be printed using a variety of technologies. In the 1960s and 70s the GAF OZALID "projecto-viewfoil" used a diazo process to make a clear sheet framed in cardboard and protected by a rice paper cover. [1] In the 1980's laser printers or copiers could make foil sheets using standard xerographic processes. Specialist ...
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