A personalizable security document comprising: a laminated body formed by a plurality of layers of at least one first material arranged on top of each other in a thickness direction (d), the body having a first side (S1) and a second side (S2) opposite to the first side (S1) in the thickness direction; and a security feature embedded in the body , wherein the security feature includes: a substrate ; a laser-sensitive material provided on the substrate ; and a protective material provided over the laser-sensitive material to separate the laser-sensitive material from a first layer of the plurality of layers arranged on top of the security feature, the protective material being formed by a material that is different from the at least one first material of the plurality of layers , wherein at least portions of the layers arranged on top of the laser-sensitive material are transparent to visible light such that a color feature produced upon irradiation of the laser-sensitive material with laser light is visible from the first side (S1), the security document being characterised in that the protective material is configured as a glass barrier, or as a silica layer or another glass-like layer deposited on the laser-sensitive material . a laminated body formed by a plurality of layers of at least one first material arranged on top of each other in a thickness direction (d), the body having a first side (S1) and a second side (S2) opposite to the first side (S1) in the thickness direction; and a security feature embedded in the body , wherein the security feature includes: a substrate ; a laser-sensitive material provided on the substrate ; and a protective material provided over the laser-sensitive material to separate the laser-sensitive material from a first layer of the plurality of layers arranged on top of the security feature, the protective material being formed by a material that is different from the at least one first material of the plurality of layers , wherein at least portions of the layers arranged on top of the laser-sensitive material are transparent to visible light such that a color feature produced upon irradiation of the laser-sensitive material with laser light is visible from the first side (S1), the security document being characterised in that the protective material is configured as a glass barrier, or as a silica layer or another glass-like layer deposited on the laser-sensitive material . a substrate ; a laser-sensitive material provided on the substrate ; and a protective material provided over the laser-sensitive material to separate the laser-sensitive material from a first layer of the plurality of layers arranged on top of the security feature, the protective material being formed by a material that is different from the at least one first material of the plurality of layers , wherein at least portions of the layers arranged on top of the laser-sensitive material are transparent to visible light such that a color feature produced upon irradiation of the laser-sensitive material with laser light is visible from the first side (S1), the security document being characterised in that the protective material is configured as a glass barrier, or as a silica layer or another glass-like layer deposited on the laser-sensitive material . <EOS>