CORRECTION TABLES FOR CANADIAN STANDARD FREENESS OF CHEMICAL PULPS ATNONSTANDARD TEMPERATURE AND CONSISTENCY

Correction tables are used to adjust the freeness of groundwood pulps tested at nonstandard temperature and consistency. There is no paralle l set of correction tables for chemical pulps. The correction tables f or chemical pulps presented in this report show that the correction va lues for chemical pulp are significantly higher than those for groundw ood pulp. The report also identifies two potential deficiencies in cur rent test methods for pulp freeness: (a) the lack of a temperature spe cification for the freeness tester and (b) failure to distinguish betw een results obtained on old- or new-style testers. Results presented h ere show that tester temperature affects freeness measurements. Other research has shown that old- and new-style testers provide significant ly different results.