rejects for both cooks was 0 10 the viscosity of the cooking medium with the additive was 12 62 sec ced and without the cooking additive was 11 45 sec ced the viscosity noted for examples 11 and 12 above provides a measurement of the cellulosic fiber length in normal cooks without using the present inventive additive viscosity rises and falls with a rise and fall in the kappa numbers higher viscosity numbers indicate the presence of longer fibers which result in stronger paper as indicated in examples 11 and 12 a drop in kappa numbers did not necessarily indicate a drop in the viscosity when the present composition was employed the esterified product of the polyoxyalkene glycols is produced by way of example only as follows the following components are added in the following percents by weight to a clean dry reactor ______________________________________carbowax peg 1000 polyoxyethylene 35 7 glycol molecular weight of 1000 carbowax peg 4600 polyoxyethylene 26 1 glycol molecular weight of 4600 pluracol p2000 polyoxypropylene 11 2 glycol molecular weight of 2000 oleic acid 27 0 hypophosphorous acid color stabilizer 0 25 methanesulfonic acid catalyst 0 25 0 50 ______________________________________ the mixture is then heated at a temperature of between about 190 and 200 degrees celsius with a.