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In a process similar to 3D printing, the material is deposited in layers. Each layer is exposed to ultraviolet light from a source attached to the pen, hardening the gel so further layers can be added, eventually building a three-dimensional framework.
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Saint of the Day

December 18 Saint of the Day

St. Rufus
December 18: Rufus and Zosimus were citizens of Antioch (or perhaps Philippi) ... Read More