Glossary of Tax Stamp Terms
There are 69 entries in this glossary.I
| Term | Definition |
|---|---|
| Indicia |
identifying marks. The term is sometimes used to denote markings that are used in place of tax stamps, but it also used as a generic for tax stamps |
| Infra Red |
that part of the electromagnetic spectrum that lies immediately beyond red light and therefore invisible to the naked eye. IR-tagged inks emit visible colours when excited with IR light and are widely used as a document protection feature. |
| Intaglio printing |
the area of the image to be printed is recessed into the surface of the printing plate via engraving or etching and the recessed areas filled with ink. This area is filled with high viscosity inks, the excess is wiped from the plates and heavy pressure is applied to transfer the ink to the paper. The resulting raised ink profile gives intaglio-printed security documents their characteristic tactility. |
| Iridescent |
the ability of some materials to create rainbow effects when they reflect white light. Pearls, oil films on water and bubbles all show iridescence. The effect can be created with foils and inks to create optically variable devices. |