Personalizable security document and method of manufacturing the same

A personalizable security document comprising:

• a substrate having a first side and a second side opposite to the first side in a thickness direction of the substrate;
• and
• a security feature formed in the substrate and extending through at least part of the substrate along the thickness direction;
• wherein the security feature comprises:
• a laser-engravable material configured to have a personalized image laser engraved therein, the laser-engravable material exhibiting a color-change effect upon irradiation with laser light, the laser-engravable material being embedded in the substrate and being visible when the substrate is viewed from the first side under white light;
• and
• an embossed pattern formed in an outer surface of the substrate on the first side, the embossed pattern overlapping the laser-engravable material and being visible when the substrate is viewed from the first side under white light;
• and
• wherein the embossed pattern comprises a first regular pattern and the laser-engravable material comprises a second regular pattern, and wherein the first regular pattern and the second regular pattern, in combination, form a moiré pattern.

A personalizable security document comprising:

• a substrate having a first side and a second side opposite to the first side in a thickness direction of the substrate;
• and
• a security feature formed in the substrate and extending through at least part of the substrate along the thickness direction;
• wherein the security feature comprises:
• a laser-engravable material configured to have a personalized image laser engraved therein, the laser-engravable material exhibiting a color-change effect upon irradiation with laser light, the laser-engravable material being embedded in the substrate and being visible when the substrate is viewed from the first side under white light;
• a first embossed pattern formed in an outer surface of the substrate on the first side, the first embossed pattern overlapping the laser-engravable material and being visible when the substrate is viewed from the first side under white light;
• and
• a second embossed pattern formed in an outer surface of the substrate on the second side, the second embossed pattern overlapping the laser-engravable material and being visible when the substrate is viewed from the second side under white light;
• wherein the first embossed pattern and the second embossed pattern form a moiré pattern when viewed against transmitted white light from at least one of the first side or the second side.