An injection molding process using warp free pigment compositions including {HEAD ~ diaryldiketopyrrolopyrroles} to improve the dimensional stability of the injection molded product by decreasing warping wherein {TAIL ~ the constituents} of the formulation being injection molded are added into an injection molding machine in ready premixed form or simultaneously as individual components 
An injection molding process using warp free pigment compositions including { HEAD ~ diaryldiketopyrrolopyrroles } to improve the dimensional stability of the injection molded product by decreasing warping wherein { TAIL ~ the constituents } of the formulation being injection molded are added into an injection molding machine in ready premixed form or simultaneously as individual components
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