Document with heat and pressure sensitive chromogentic composition thereon
作者： Richard H. Johnson , John C. H. Chang
DOI:
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摘要: A pressure and heat-sensitive composition comprising chromogen-containing pressure-rupturable microcapsules color developer useful for verification of document authenticity system when applied as a localized coating on documents, such checks prescriptions. Quickly striking the chromogenic with fingernail or blunt object to generate heat in produces colored image by friction. The possesses fugitive characteristic, whereby gradually disappears can be made reappear is again subjected external heat. This feature used repeated document.
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