Hohenstein has been a partner of the German Certification Association for Professional Textile Services Partner since 1953, and is responsible for quality assurance at more than 400 commercial laundries that are current members of the Certification Association. In this regard, our independent laundry experts make regular unannounced visits to all the facilities to check their technical and hygiene-related processes. The auditing of the laundry facilities is supplemented by continuous self-checks based on wash cycle monitoring. Hohenstein inspects the laundries on the basis of a requirements catalogue compiled by the German Institute for Quality Assurance and Certification (RAL) and the German Certification Association for Professional Textile Services. This catalogue defines the technical, organizational, personnel and hygiene requirements for the laundry facility and laundry treatment.