Date of Award
Bachelor of Science
Paper Science and Engineering
Dr. Ellsworth Shriver
Even though a fairly high brightness can be obtained, mechanical pulps, such as refiner mechanical pulp, contain all of the color forming groups found in the wood. This limits its use because these groups revert back to a yellow color over time. If they could be removed by washing, RMP could be used in a wider variety of grades. This project will discuss background on the subject, followed by a design and procedures to try and accomplish this goal.
It was found that excessive washing will give a temporary increase in brightness, however no statistical change in reversion is seen.
Hellberg, Craig, "Washing Between and After a Two Stage Hydrogen Peroxide Bleaching Sequence to Reduce Reversion and Increase Brightness" (1992). Paper Engineering Senior Theses. 188.