Mikrotrükki

Mikrotrükki, also known as microprinting, is a security feature used on various documents like banknotes, passports, and official certificates to prevent counterfeiting. It involves printing extremely small text, often too small to be easily replicated by standard photocopiers or printers.

The text used in microprinting can be a series of numbers, letters, or even specific phrases related to the document's origin or purpose. When viewed under magnification, this fine detail becomes legible. The technology behind microprinting has evolved significantly, allowing for increasingly intricate designs and smaller print sizes.

The effectiveness of microprinting lies in the difficulty of reproducing such fine details without specialized equipment. Standard office printers and copiers typically cannot achieve the resolution required to accurately replicate microprint, causing it to appear as a solid line or disappear altogether when enlarged. This makes it a valuable tool for authentication, allowing officials and the public to quickly verify the legitimacy of a document.