Hot Stamping

What Is Hot Stamping?

Hot stampingHot stampingManufacturingFoil or hologram application using heat and pressure.Click to view → is a card finishing technique that transfers metallic foil, holographic security features, or colored films onto the smart card surface using heated dies under pressure. The process creates a permanent, tamper- evident decorative or security element that is difficult to reproduce with standard printing equipment, making hot stamping a key anti-counterfeiting measure on payment cards, identity documents, and high-security access badges.

How Hot Stamping Works

The hot stamping process involves four components:

1. Die -- a custom-engraved metal plate (typically brass or silicone rubber) carrying the design pattern.
2. Foil -- a multi-layer film consisting of a release layer, lacquer layer, metallized layer (aluminum or holographic pattern), and adhesive layer.
3. Heat -- the die is heated to 100-200 C, activating the foil's adhesive layer.
4. Pressure -- the heated die presses the foil against the card surface for 0.5-2 seconds, transferring the metallic or holographic layer.

Types of Hot Stamping Foils

Application in Smart Cards

Hot stamping serves both aesthetic and security purposes:

• EMV payment cards -- holographic strips or patches (e.g., Visa dove, Mastercard hologram) are applied via hot stamping as brand authentication and anti-counterfeiting features.
• eID cards -- national identity documents use OVD hot stamps incorporating the national coat of arms or other sovereignty symbols that shift color when tilted.
• ePassport data pages -- polycarbonate data pages receive holographic laminates that protect against photo substitution.
• Corporate badges -- company logos and security features applied to access control cards.

Relationship to Other Personalization Methods

Hot stamping is one of several card surface finishing techniques:

Hot stamping is typically performed on the card body before chip embedding, though some processes apply foil after the module is installed, requiring careful alignment to avoid covering the contact pad.