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 info@ptlp.com.