Date of Award


Degree Name

Bachelor of Science


Pulp and Paper Technology


The purpose of this study has been to determine the influence of the sequence of dilution upon the potential brightness of coated board. The sequence of diluting a coating slurry was varied and its effect upon the brightness of doubly coated board was noted. Besides the measurement of brightness, the coat weight and scattering coefficients were determined. The brightness was determined on the standard I.P.C. Brightness meter. The coat weight was determined from a modification of Tappi Standard T-627m58 while the scattering coefficient was determined from a table of brightness and scattering power.

The results indicated that diluting a coating slurry after mixing the adhesive and pigment together has the least detrimental effect on brightness, while diluting the adhesive before mixing with the pigment has the most detrimental effect upon the brightness. The above findings are explained in terms of varying degrees of pigment and adhesive bonding.