percent dyeability of the other products changed much less during this whole period and could be retained within the acceptable range by using the bosley technique this experience was typical of some previous unsatisfactory experiences with the bosley technique if one product can deviate significantly from 100 whereas other products can be retained more or less constant at about 100 of aim by the bosley technique the same continuous polymerization system was later operated in the manner described above except that a sufficient amount of a branching agent the trishydroxyethyl ester of trimellitic acid tage to give 82 ppm of tage in polymer i e 0 24 meq was added to the ethylene glycol input stream and adjusted along with deg according to the methods described above to maintain percent dyeability better on aim the percent dyeability values measured are plotted on the right side of fig2 the sensitive product values for this run are indicated by solid circles joined by a heavy line and the average of the other products by triangles lighter line by adjusting the amount of tage as well as deg it was possible to keep the dyeability of the products closer to aim than during the comparison production run described above so almost all of this production was within the dyeability limits the.