Adhesion of windowed security threads

Tuesday, 07 September 2021 / Published in
The security thread is usually a 1-3 mm wide metallised strip that lies within the paper, as it is already introduced into the paper mass during substrate production. A variant is the window security thread, which lies open in sections by reducing the thickness of the paper as with a watermark. This is usually 3-6 mm wide and can also be provided with additional optical or invisible properties.

Lifetime test of banknotes

Friday, 03 September 2021 / Published in
The test procedure is used to simulate the durability of banknotes in relation to physical and chemical influences. The test can draw conclusions about how the durability of the banknote develops during circulation and how the optical appearance changes due to soiling.

Examination of the new 50 Swiss Franc banknote

Friday, 15 April 2016 / Published in
Tagesanzeiger.ch/Newsnet wanted to know: What can the new 50 note withstand? They commissioned Ugra's testing laboratory to carry out three tests with the brand new banknote.