Security infilling hidden image create by the computer algorithm software to encryption artwork,the pattern nothing change by naked eyes, hidden image will appear under custom gratings. It'amp;dots widely applicable to most of the anti-counterfeit products.
advisory
The security of passports and certificates to avoid frauds and to perform customs control is very important.
Security intaglio printing is a long-established security printing technique, used not just for passports, banknotes but brand protection security sticker too.
