| abstract |
Described is a label for a substrate. The mark comprises at least one luminescent substance (a) and at least one pair of palm liquid crystal polymer (CLCP) material (b), the at least one pair of palm liquid crystal polymer (CLCP) material (b) having a reflection wavelength range, the reflection The wavelength range overlaps with at least a portion of the emission wavelength range of (a), provided that at least a portion of (b) is not located below (a). |