Plastic processing with controllable decontamination.

Method for reprocessing containers used plastic, particularly PET bottles, comprising the steps: a) analysis (102, 202) the degree of contamination of the plastic, b) determining (106, 221, 223) of process parameters decontamination depending on the degree of contamination found in step a) and c) controlled decontamination (112) of plastic according to the process parameters of certain decontamination.