According to the security features used, the security levels can be identified as follows:

1. Security of First Level – The features can be seen by everybody without using additional devices – relief printing, optical variable devices, water marks, latent images, optical variable inks, security threads, design guilloches, etc.

   
   

2. Security of Second Level– The features can be controlled by use of special equipment – UV lamps with different wave lengths, special detectors, optical glasses, readers, etc.

   
   

3. Security of Third Level– The features can be controlled only in special laboratories, using necessary nonstandard devices and equipment.

The BNB Printing Works Corp. produces documents and securities with all levels of security, combined in a suitable way, according to the product specification. Experienced specialists are advising the customers on the choice of security elements in order that an optimum individual configuration be obtained.