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What Is Pad Printing?
Home Computers & Technology Technology
By: Lou Orlando Email Article
Word Count: 460 Digg it | Del.icio.us it | Google it | StumbleUpon it

  

Pad printing is a modern printing process that can be used to quickly transfer 2-D images on to all sorts of 3-D objects. However, before getting into a description of what pad printing is, it's important to first define a few specific elements that pad printing relies on.

First, it's important to understand gravure printing. Gravure put simply, is a process that etches an image onto the surface of a metal plate. This places the images - in ink form - in the recesses of the metal plate, unlike relief printing (where the image is raised). By filling the recesses with ink, and leaving the raised portions of the plate dry, the image can be transferred from the plate to the substrate quickly and cleanly. Gravure can produce very fine and detailed images on short or long runs in multiple colors.

Beyond the gravure printing process, pad printing also relies on plates - or cliches. In traditional offset processes, printing relies on transferring an inked image from an offset (the plate) to a rubber blanket which then makes contact with the print surface. When compared to other modern printing methods, offset printing with plates is one of the best solutions when it comes to economically producing commercial quantities of high quality prints, without requiring much maintenance. Today, cliches are made from metal or polyester.

However, pad printing is unique when compared to other gravure and offset methods in that the ink is transferred from the plate with a silicone pad, which then transfers the ink to the substrate. This allows the process to be used for a number of products that would otherwise be impossible to print on, including medical products, electronics, appliances, toys, sports equipment, and more.

Crude forms of the basic premise behind pad printing have existed for hundreds of years. However, the popularity of the process enjoyed rapid expansion when the availability of modern manufacturing made widespread commercial use feasible. This expansion was felt first by the watch-making industry after the Second World War, which then gave way to pad printing being used for far more products. Since then, the method has experienced substantial growth due to the many applications that have found a use for it.

Partly to thank for the rapid growth of pad printing has been the increased availability of advanced silicone. The unique properties of the silicon pads used for the process gives it its highly sought after ability to pick the image up from a flat plate and then transfer it to a number of surfaces - including flat, spherical, textured, concave, and convex surfaces. This makes this specific printing technique invaluable for everyone from appliance manufacturers to electronics manufacturers who need a better solution for membrane switch printing.

Lou Orlando frequently writes about computer technology and its impact on the industrial world. Most recently he has written about 3D printing, printing for curved appliances and panels and pad printing supplies.

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