- all holograms can be provided by numeric or alphabetic series
- ways of making holograms:
     1. implementation into the holographic layer, there by the visual feature
        of the holograms is sustained, it means the variable colour scheme
     2. thermo transfer technique - all texts can be printed in any color
         which is then inalterable and maintains a uniform color
         from any visual angle

- certificates, valuables or shares
- security seals
- competition coupons

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