Half Window
A variety of a clear window, with one side of the banknote opacified. It is created during the manufacturing process of the polymer substrate. The resulting effect is a glossy surface on one side, while the other side becomes a normal printing surface (fig. 1).
![](https://static-content.regulaforensics.com/Glossary/Banknotes/A-H/Half_Window_01.webp)
a
![](https://static-content.regulaforensics.com/Glossary/Banknotes/A-H/Half_Window_02.webp)
b
Fig. 1. Half Window. 5 Malaysian Ringgit (2004):
a – transparent side; b – opacified side