Red-red decoder cardboard spectacle

Red-red decoder spectacle often used for commercial purposes.

The purpose is to read green printed text that is printed behind red printed text.
This requires a very accurate chosen colour for printing.

• Often a chaotic patern is used to print over the to be discovered text or image.
• Then you prevent to discover the picture without spectacle.
• The opposite spectacle is green-reen.
• These spectacles are intend to be used once or twice.
• For that reason they cannot be returned.
  
  Minimum order quantity is 4 pieces.