Biocides kill microorganisms and are therefore harmful to humans and the environment. These properties are clearly indicated by the classification and labeling as a hazardous substance. The European Commission has found that biocidal compounds that are well-proven in the printing process can be more damaging to the environment than previously thought. Therefore, the requirements for the classification and labeling of biocidal products have significantly worsened and must be implemented by the manufacturers by 1 May 2020.