paper and boards Quality control

• Quality control


  Ensuring consistent quality and finish of mass produced items
• Registration marks


  1. Printed on the outer edge of a commercially produced item

  2. Using the four-colour printing process
• If the printing is accurate

  Registration marks should overlap precisely and be entirely black
• If colours are slightly out of register or offset

  Registration marks will show
• Colour bars


  Used to measure various aspects of printing such as ink density, overprinting or misalignment