Process for producing clear polypropylene based stretch blow molded containers with improved infrared heat-up rates

A process for producing clear injection stretch blow molded containers comprising: (I) molding a propylene polymer composition comprising: (A) a propylene polymer chosen from: (i) a homopolymer or minirandom copolymer of propylene containing up to 1.0 wt% of at least one of ethylene and C4-C10 a-olefins; (ii) a random copolymer of propylene and at least one olefin chosen from ethylene and C4-C10 a-olefins; and (iii) mixtures thereof, the propylene polymer having a melt flow rate of from about 1 to about 50; and (B) about 1 to about 1000ppm, based on the weight of the propylene polymer, of at least one radiant heat absorbent; thereby forming a preform; and (II) stretch blow molding the preform; wherein in step II, heat is supplied by infrared radiation, and the containers have a haze valve less than 25.0%.