A method of shaping plastics material pre-forms into plastics material containers with the steps: introducing a plastics material pre-form into a blow mold; conveying the blow mold with the plastics material pre-form along a pre-set conveying path; acting upon the plastics material pre-form with a gaseous medium during a pre-set period of time for the expansion thereof, wherein the supply of the gaseous medium is carried out in a controlled manner; and releasing the container from pressure at a pre-set point in time. According to the invention the pre-set point in time (t2) is variable.