WinBoss
WinBoss Embossing Effect type: Window embossing (polymer substrate) Origin: Note Printing Australia (NPA)
WinBoss is a window embossing technique developed within the Australian polymer banknote ecosystem and associated primarily with Note Printing Australia (NPA), which has been a central force in advancing polymer banknote technology since the first polymer note entered circulation in 1988. Although used as a de facto brand name across the industry, WinBoss describes a specific manufacturing process rather than a proprietary commercial product, and it has become a standard term for this class of security feature in forensic and technical literature.
The technique produces an image — most commonly a denomination numeral — within the transparent window of a polymer banknote through colourless embossing, making it visible under both reflected and transmitted light, and combining tactile and visual authentication characteristics. Because the embossing is colourless, the image is essentially invisible when the note is held flat under direct illumination, but becomes clearly legible when tilted under oblique or raking light, or when held up to a point light source in transmission. This dual-mode behaviour across two distinct lighting conditions gives the feature an intuitive and memorable authentication cue for the general public.
The technique exploits the unique physical properties of the polymer substrate, which can be mechanically deformed under controlled pressure to produce a permanent raised relief structure within the clear window area without any ink or coating. This makes the feature inherently resistant to counterfeiting — replicating the precise deformation geometry in an unauthorised substrate, with the correct optical response in both reflection and transmission, demands tooling precision and materials knowledge well beyond the reach of illicit production. The feature also adds a subtle tactile dimension to the window area, detectable by touch and useful as an aid to denomination identification for the visually impaired.
WinBoss embossing is frequently used in combination with the related WinVU feature, which applies full, half, and colour-shifting inks within the window area, together providing a layered suite of visual effects that significantly raises the security of the polymer window zone.
- Name
- WinBoss
- Category
- Security Feature
- Effect Types
- Embossing
- Linked Features
- 1 security feature