Security Features
- The materials of the banknotes basically are long fibres from any kind of wood, or a mix of different types of wood. However, the preferable material is the Abacá fibre, which is naturally plentiful in Indonesia and is believe to increase the durability of the banknotes. The banknotes are made with the process of heating, to create a unique type of pulp.
- The minimum security features for naked eyes are watermarks, electrotypes and security threads with color fibres. In addition to this, extra features may be included, such as holograms, Irisafe, iridescent stripes, clear windows, metameric windows and gold patches.
- Watermark and Electrotype are made by controlling the gap of density of the fibres which create certain images for the banknotes. This is done to raise the quality of the notes from the aesthetic view.
- Security threads are put in the middle of the note's materials so horizontal and vertical lines are shown from top to bottom. The threads also can be made with many variations such as the materials, size, color and design.
Read more about this topic: Banknotes Of The Rupiah
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