The following leading research laboratories have conducted independent tests that confirmed the safety and effectiveness of the Bookkeeper process.

  • Institute of Paper Science and Technology (Atlanta)
  • Institut Royal du Patrimoine Artistique (Belgium)
  • TNO (The Netherlands)
  • Meets ISO 14523 Photographic Activity Test
  • Data from independent test performed at the Image Permanence Institute at Rochester Institute of Technology
  • Chicago Paper Testing (Chicago)
  • Library of Congress

If you are interested in reading the results of these independent tests, please contact us via