24 9 the incoming samples of 30 kraft and 70 mechanical pulp mixture from a pulp mill in british columbia canada with a brightness of 78 iso and a concentration of 0 7 was treated with three different fwa 39 s at 40 u00b0 c and 5 minutes of retention time from the results shown in table 1 it is evident that under the same dosage fb 71 can obtain a significantly higher brightness value compared to the conventional fwa 39 s when used on production that requires more mechanical pulp than kraft pulp the incoming paper samples from a paper mill in british columbia canada with a brightness of 84 iso were coated with coating color and two different fwa 39 s from the results shown in table 2 it is evident that under the same dosage fb 71 can obtain a significantly higher brightness compared to the conventional fwa 39 s when used on production that requires coating materials the incoming samples of 100 kraft pulp from a pulp mill in british columbia canada with a brightness of 88 iso and a concentration of 1 0 was treated with three different fwa 39 s at 40 u00b0 c and 5 minutes of retention time from the results shown in table 3 it is evident that fb 71 has a plateauing effect with whiteness as the dosage is increased whereas the two conventional fwa 39 s causes yellowing once overdosing occurs a plant test was performed at a pulp and paper mill in british columbia canada incoming pulp with 86 iso brightness and a concentration of 0 7 was used to make paper products from the results shown in table 4 it is clear that fb 71 is effective in stabilizing paper and has.