Documents and methods of manufacture thereof

A method of manufacturing a series of documents which are identical in content except for a respective identifier which uniquely identifies each document within the series, each identifier comprising at least a first indicium, the or each indicium defining a boundary;

• the method of manufacturing each document comprising the steps of:
• providing a substrate;
• applying a first background print on the substrate, the first background print defining at least part of the boundary of an indicium receiving area;
• applying the respective identifier on the substrate, such that the first indicium is provided in the indicium receiving area;
• the first background print and the respective identifier being provided such that when the document is viewed in at least one of transmission and reflection the juxtaposition of the first background print and the first indicium is such that a keyline extending around at least a portion of the boundary of the first indicium is defined between the first indicium and the boundary of the indicium receiving area;
• wherein
• the document is transparent or semi-transparent across part of, or the whole of, the indicium receiving area, and
• the first indicium is visible in its entirety from each side of the substrate when the document is viewed in transmission and reflection.

A document of a series of documents which are identical in content except for a respective identifier which uniquely identifies each document within the series, each identifier comprising at least a first indicium, the or each indicium defining a boundary;

• the document comprising:
• a substrate;
• a first background print provided on the substrate, the first background print defining at least part of the boundary of an indicium receiving area;
• the respective identifier provided on the substrate, such that the first indicium is provided in the indicium receiving area;
• the first background print and the respective identifier being provided such that when the document is viewed in at least one of transmission and reflection the juxtaposition of the first background print and the first indicium is such that a keyline extending around at least a portion of the boundary of the first indicium is defined between the first indicium and the boundary of the indicium receiving area;
• wherein
• the document is transparent or semi-transparent across part of, or the whole of, the indicium receiving area, and
• the first indicium is visible in its entirety from each side of the substrate when the document is viewed in both transmission and reflection.

A series of documents which are identical in content except for a respective identifier which uniquely identifies each document within the series, each identifier comprising at least a first indicium, the or each indicium defining a boundary;

• each document comprising:
• a substrate;
• a first background print provided on the substrate, the first background print defining at least part of the boundary of an indicium receiving area;
• the respective identifier provided on the substrate, such that the first indicium is provided in the indicium receiving area;
• the first background print and the respective identifier being provided such that when the document is viewed in at least one of transmission and reflection the juxtaposition of the first background print and the first indicium is such that a keyline extending around at least a portion of the boundary of the first indicium is defined between the first indicium and the boundary of the indicium receiving area;
• wherein
• the substrate is transparent or semi-transparent across part of, or the whole of, the indicium receiving area, and
• the first indicium is visible in its entirety from each side of the substrate when the document is viewed in transmission and reflection.