n methyl pyrolidone the ink compositions have been specifically developed to provide adhesion washability and decorative features to fabricated polyvinyl chloride surfaces the ink compositions available from polytex environmental inks ltd of bronx n y include coalescing agents such as ethylene glycol ether derivatives to provide adhesion to rigid polyvinyl chloride surfaces specifically the coalescing agents etch the surface of the polyvinyl chloride profile to promote adhesion to an otherwise non porous surface referring to fig2 the extrusion and cooling assembly of the in line production assembly 10 is shown in more detail specifically the heated thermoplastic material exits the extruder 12 through a die head 30 structured to define the general configuration of the extrusion profile in a preferred embodiment the extrusion profile is of a transverse cross sectional configuration and dimension adapted for use as a louver vane for window covering assemblies the continuous length of extrusion profile exiting the extruder 12 is directed along a series of sizing tables 32 33 and 34 each of the sizing tables are provided with upper and lower blowers 36 to cool the extruded thermoplastic material as it advances along the production line assembly 10 towards the hauling tension apparatus 16 fig3 generally illustrates the printing apparatus 20 and web tensioners 18 22 at opposite ends.