Vízjeleket

Vízjeleket, which translates to "watermarks" in English, refers to a variety of marks or patterns impressed into paper during its manufacture. These are typically created by raising a design or pattern on the mold used to form the paper sheet. As the wet pulp is pressed and dried, the thinner areas created by the raised design become more translucent, making the watermark visible when the paper is held up to a light source.

Historically, watermarks served as identifying marks for paper manufacturers, allowing them to distinguish their products. They became prominent in the late medieval period and were widely used throughout Europe. The designs could range from simple shapes and initials to elaborate crests and symbols.

Beyond their origin as manufacturer's marks, watermarks have also been used for other purposes. In document authentication, they can help verify the age and origin of paper, acting as a security feature against forgery. Certain historical documents or artwork printed on specific types of watermarked paper can be dated and attributed based on the watermark's design and the known production periods of paper mills.

In contemporary times, the concept of watermarking has evolved significantly, particularly in the digital realm. Digital watermarks are embedded data within an image, audio, or video file that can be used for copyright protection, content tracking, or authentication. While the principle of adding an identifier remains, the method and medium are entirely digital.