the invention relates to a method of producing a container from a thermoplastic blank , comprising : a step in which the blank is heated using at least one beam of coherent electromagnetic radiation , and a step in which the container is formed from the blank thus heated . the invention also relates to an installation which is used to produce containers and which comprises a unit for heating the blanks in order to form containers from the blanks thus heated . the inventive installation defines a path along which the blanks travel inside the heating unit . in addition , the heating unit comprises at least one coherent electromagnetic radiation source which is directed towards a zone that is located on the aforementioned path .