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Security thread

February 3, 2021

Plastic, metal or other material, incorporated into the paper sheet during its manufacturing process, fully or intermittently. A window thread appears on the paper’s surface at defined points, and is partially visible, however, in transmitted light appears across the entire length of the note. The thread may be able to contain any of the following: visible or machine-readable codes, microprinted or mini-printed text in positive or negative, or display of fluorescent, iridescent, holographic or metallic gloss effects. A variant is the strap thread, which is not quite an intermittent thread, but a continuous band with metal segments applied by heat onto the paper surface.