Lenticular cards
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| Lenticular printing is a multi-step process consisting of creating a
lenticular image from at least two existing images, and combining it with a
lenticular lens. This process can be used to create various frames of
animation (for a motion effect), offsetting the various layers at different
increments (for a 3d effect), or simply to show a set of alternate images
which may appear to transform into each other. Once the various images are
collected, they are flattened into individual, different frame files, and
then digitally combined into a single final file in a process called
interlacing. From there the interlaced image can be printed directly to the back (smooth side) of the lens or it can be printed to a substrate (ideally a synthetic paper) and laminated to the lens. When printing to the backside of the lens, the critical registration of the fine "slices" of interlaced images must be absolutely correct during the lithographic or screenprinting process or "ghosting" and poor imagery might result. The combined effect can be used to show two or more different images simply by changing the angle one views the print from. If you use more images, taken in a sequence (30+), one can even show a short video of about one second. Though normally produced in sheet form, by interlacing simple images or different colors throughout the artwork, lenticulars can be created in roll form with 3D effects or multi-color changes. Alternatively, one can use several images of the same object from slightly different angles and then create a lenticular print, which will then result in a three-dimensional effect. 3D effects can only be achieved in a side to side (left to right) direction, as your left eye needs to be seeing a slightly diiferent angle as your right to achieve the stereoscopic effect. Other effects, like morphs, motion, zooms work better (less ghosting or latent effects) as top-to-bottom effects but can be achieved in both directions.
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Lenticular cards
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