After more than 30 years in the production and development of haptens for patch testing, we work in close cooperation with dermatologists practising clinical and experimental patch testing. By cooperating with national contact dermatitis groups in various countries we want to meet the needs specific to different regions. We are guided by national groups such as NACDG and the international group International Contact Dermatitis Research Group (ICDRG) as well as European Environmental and Contact Dermatitis Research Group (EECDRG). With this in mind we believe ourselves to be as up to date as possible and able to facilitate dermatological investigations where patch tests are involved.Our aim is not only to provide dermatologists with the necessary haptens and Test Chambers for patch testing, but also to actively take part in the development and selection of haptens, with special emphasis in the field of occupational dermatology. Our work is also focused on the standardization of patch test haptens and development of new methods and medical devices. Our striving towards these goals is facilitated by the fact that we specialize in, and only work with, products in the field of diagnostic patch testing and contact allergy.