Gebrüder Wollenhaupt GmbH   Since July 1997, the management system of Gebrüder Wollenhaupt is certified according to the current ISO 9001 standard. ISO 9001:2000 certificate german Click here to print PDF file (423kb) ISO 9001:2000 certificate english Click here to print PDF file (405kb) Since December 2005, Gebrüder Wollenhaupt is certified according to the International Food Standard. International Food Standard certificate german Click here to print PDF file (189kb) International Food Standard certificate english hier als PDF ausdruckbar (183kb) Since 1997 the requirements according to regulation (EWG) No. 2092/91 for placing products into circulation with reference to organic cultivation are audited annually by an independent board of control. BCS Eco-Guarantee Certificate german Click here to print PDF file (372kb) BCS Eco-Guarantee Certificate english Click here to print PDF file (353kb) The Speciality Tea Institute belongs to the USA Tea Association and performs intensive tea tasting trainings. As we are members of this institute we are part of an international network of tea specialists. Specialty Tea Institute Membership Certificate Click here to print PDF file (211kb)