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US08506696B2 Erasable liquid ink 失效
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Erasable liquid ink
摘要:
According to one embodiment, a liquid ink includes a leuco dye, a developer, and a solvent. The developer is selected from wherein X1 is selected from H and CH3, X2 is selected from H and OH, X5 is selected from C(CH3)2 and CO, and X4 is selected from phenyl group and alkyl group.
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