extremely small text   recognized as a line or design element   possibility to add minor irregularities   higher security by using higher resolution for the output   higher security by not using commercially available software

  invisible for the human eye
  easy to verify with simple tools
  additional information can be added

	sophisticated continous linestructur   possibility to add minor irregularities   higher security by using higher resolution for the output   higher security by not using commercially available software

	special screen structures   freely definable shape of the screen dots   copy protection

	classic security feature   easy to recognize as security feature   sophisticated continous linestructur   possibility to add minor irregularities   higher security by using higher resolution for the output   higher security by not using commercially available software

	sophisticated continuous line structures   adds relief effects and implements images and text elements   higher security by using higher resolution for the output   higher security by not using commercially available software