Date of Award


Degree Name

Bachelor of Science


Paper Science and Engineering


The purpose of this study was to examine how CMC, HEC and Kelgin QL function in their control of water retention. It is proposed that their performance can be related to the presence of hydroxyl and carboxyl groups on the hydrocolloid molecule. It was also proposed to study the effect of pigment selection on water retention. Water retention values (WRV) were measured on a modified S. D. Warren conductivity tester. It was concluded that the proposed theory represents a valid explanation of the water retention mechanism involving these additives. Differences in WRV of the additives was attributed to structural differences between the additive molecules. It was also concluded that no single factor-hydrophilic tendency, particle size, shape or distribution- could be identified to account for differences in WRV or improvement when pigment selection was varied.