Date of Award


Degree Name

Bachelor of Science


Pulp and Paper Technology


The literature survey shows that chlorine dioxide can be used to bleach virgin pulp to a high brightness. The purpose of chlorine dioxide is to preserve the strength of the pulp.

The purpose of this thesis was to find out if chlorine dioxide could be used to preserve the strength of deinked paper stock.

Paper stock was found to lose strength when bleached with calcium hypochlorite and mixed with virgin pulp the loss of strength carried over in the mixture.

When the paper stock was bleached with chlorine dioxide, there was no loss of strength in the paper stock.