Planchettes
Thin round or many-sided discs 1-4 mm in size which are made of polymer or metallized material. Planchettes are embedded into the substrate surface during the paper manufacturing process. They are placed randomly or located in a certain area of a sheet. Planchettes can be colorless, colorful, luminesce in UV light, have holographic effects, contain microprinting.
a
b
c
Fig. 1. Australia. Passport issued in 2009:
a — page 19. Paper substrate; b — the same. Colorless planchette; c — the same. Planchette with microprinting in the form of AUS symbols which luminesce in UV light
a
b
Fig. 2. USA. Passport issued in 1994:
a — data page. Paper substrate; b — the same. Planchettes with holographic effect located in the upper part of the data page