DOVIDs are incorporated in government-issued documents of value (banknotes, passports, visas, identification credentials and driver licenses) to increase their counterfeit resistance.
Transparent DOVIDs can be applied in patch form or as a laminate covering the entire surface of the substrate, e.g. the paper-based data page of a passport.
This type of DOVID is not well suited for protecting banknotes due to the moisture sensitivity of the HRI material, but they are widely used for securing some government-issued identity documents.
For over thirty years, this type of DOVID has been used to protect banknotes and applied in patch or stripe form.
Typical designs include metallized guilloche patterns with clearly defined movements and fully transparent intermediate areas (i.e., with no diffractive structures) revealing the underlying document or banknote security print.
The precise, tightly toleranced registration between the diffractive images and the metallization makes it harder for counterfeiters to mimic the DOVID appearance.
For banknotes, DOVIDS are applied to the paper or polymer surface (as a patch or stripe) or incorporated as a windowed security thread.