Blow molding composition and process

A process to prepare a blow molded article, wherein said process comprising:

• I) preparing a parison from a blow molding composition comprising
• A) a chromium catalyzed ethylene copolymer having
• i) a high load melt index, as measured by ASTM 1238 at 190° C. using a 21.6 kg load, of from 2 to 10 grams/10 minutes;
• ii) a density of from 0.944 to 0.955 g/cc;
• iii) a crystallization half time of greater than 20 minutes when measured at 125° C. and in the absence of a nucleating agent;
• and
• B) from 100 to 5000 ppm of nucleating agent,
• wherein the crystallization half time of the composition containing the nucleating agent is at least 10% lower than the crystallization half time of the non nucleated copolymer (A).
• II) subjecting said parison to a blow molding process.