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Some paper seems like magic: Just apply heat and letters and lines appear before your very eyes. This kind of paper is called "thermal paper" (thermal=heat), and it can be found everywhere around us.The heat-sensitive paper used in word processors and fax machines, train tickets, receipts...all of these are printed by the power of heat without any ink at all.Let's take a look at the secret behind the "magic."
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Last Modified : April 1 ,2000
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