twin screw machine was run at 500 rpm the washing of the flush was done using water and other ingredients in the washing zone the product after washing was dried using vacuum in the barrels with vacuum and then dried by heating the drying zones the discharge temperature was about 135 140 u00b0 c the pigment had converted to the bluer shade lower discharge temperature inhibits the conversion to bluer shade the dried flush can be letdown by injecting the letdown materials in the twin screw or can be done separately in another tank the discharge rate of the flush was about 60 65 dry pounds the resultant flush was mixed with the necessary cutback materials and when tested versus standard was somewhat dark in mass tone slightly yellower in shade slightly high for gloss the dispersion of the flush on the grind gauge test was good with only 2 scratches the above example was repeated using the washed preflush and obtained similar results in this case the washing was eliminated in the twin screw a concentrated c i pigment yellow 12 slurry was made in a conventional way at 10 11 pigment the resultant slurry containing 59 27 parts of pigment was mixed with a composite containing 90 hydrocarbon resin solution and 10 magie 47 oil at 60 65 u00b0 c to form the preflush the preflush so formed had a composition of 59 3 pigment 36 7.