800 r p m there was charged 10 kilos kg of the foregoing polyester containing cobeat 11 4 kg dry basis of polystyrene micro bits 6 4 kg of polyvinyl alcohol 98 hydrolyzed powder 3 8 liters of technical grade concentrated sulfuric acid 98 6 and 9 1 kg of sodium hexametaphosphate to continue in a circular path for the period of 3 minutes for the defibering rotor to disperse the solids as separated fibers into homogeneous slurry in clump free state with the rotor stationary there was admixed 45 4 kg each of 1 27 cm length type k fiber of 12 microns diameter and 49 53 mm long de fibers of 6 microns diameter and the mixing then resumed for 17 minutes the resulting glass fiber containing dispersion then was transferred to the beater chest into 1890 liters of water in the pulper there was admixed while stirring 91 liters of the 6 solids containing aqueous collodial solution of the cationic melamine formaldehyde resin the specifications of which are given shortly below the mixing was continued for half a minute and the resulting diluted melamine formaldehyde resin dispersion was admixed into the beater chest content the pulper then was flushed with 1890 liters of water and the resulting wash water also was admixed into the beater chest the beater chest content at a dispersed solids consistency of 0 6 as a homogeneous dispersion was transferred to the machine chest used in paper making to hold stock to be fed to the head.