its usage advantageous in any conventional pigment application for example in paints inks coatings color filters plastics fibers textiles and the like the invention will now be described in greater detail with reference to the following non limiting examples 80 parts by weight of 2 5 dianilino terephthalic acid data are mixed with 200 parts by weight of polyphosphoric acid having an acid strength at 121 this is done in a sigma blade kneader at room temperature and mixed to wet out dry intermediate forming a smooth magma the magma is heated to 100 110 u00b0 c and is held with mixing at this temperature for 6 hours to the hot magma is added 40 parts of dipropylene glycol and kept at a temperature between 95 100 u00b0 c for 10 hours the swelled medium is then hydrolyzed by pouring into a reactor containing 1600 parts of water the resulting slurry is stirred for three hours and is filtered and washed with water to neutral this water washed presscake is then dispersed in 860 parts of methanol and is added to 140 parts of 50 sodium hydroxide solution this methanol pigment slurry is heated in a closed vessel for 3 hours at a temperature of 130 u00b0 c with stirring the vessel is then cooled to zero pressure and the pigment is filtered washed with water to neutral and conductivity of 200 micromhos and dried the dry product.