Date of Award


Degree Name

Bachelor of Science


Paper Science and Engineering


Since 1974, the use of ultraviolet-cured inks and coatings has become popular with the printing industry. Unfortunately for the deinking industry, removal of these inks is difficult using conventional methods in the U.S. Theory and laboratory work suggests these special inks may be removed using the flotation process.

It was discovered that the optimum flotation cell temperature for UV-cured inks is not significantly different than the optimum temperature for normal emulsifiable inks. However, optimum cell pH was found to be different between the two inks, and most effective at low pH for UV-cured ink.