Watermarking is one of the oldest ways of making and identifying paper as well as preventing falsification.

It used to be done as follows: some pulp was placed on the sieve. The majority of water contained in it had to be removed through the sieve. Lined figures or relief  that formed on the surface of the sieve appeared on the paper as clear grains or images giving darker or lighter impression. This was caused by the sieve's uneven surface that made the fibres deposit in layers of different thickness, thus forming a figure on the paper.

Papers manufactured in Diósgyőr are not only safe but are also pleasing to the eye. The own watermark of the mill - acorns with oak-leaves - has been known for a long time and it is still an existing sign of the mill even today. This watermark is a protected one since 24. June, 1924. The sieves for the watermarks are prepared in the own workshop of the mill.

Types of the watermarks:

• simple linear watermarks
• multitone watermarks
• portrait watermarks
  

Papers can be produced also with a unique watermark, these can help a company to achieve and strengthen its own image. This aim can be also realised with the usage of our self-copying invoice paper with watermark.