New Discs 
If requested at the time of order, Lovibond^® colour grading discs can be supplied with either a Certificate of Conformity or a Calibration Certificate. A Certificate of Conformity confirms that the disc has been manufactured, inspected and tested under the control of our ISO 9001 Quality Management System and conforms in all respects with the stated standard or test method. A Calibration Certificate states the values obtained when measuring a set of traceable reference standards.

Used Discs 
Depending on the requirements of the quality control system, used discs can be returned at regular intervals to The Tintometer Ltd, Amesbury, UK, or Tintometer Inc., Sarasota, US for checking, recertification or recalibration. The Tintometer Ltd or Tintometer Inc. will also refurbish and clean Lovibond^® test discs.