The “Pragovac” trade fair in the Czech capital Prague is one of the most important trade fairs in Europe for vacuum products. Fortunately, in November 2021 the fair was able to take place again as a presence fair. Alumina Systems GmbH was represented by its Czech subsidiary with its own booth. Our employee Jiri Klejch presented our vacuum technology products, e.g. power feedthroughs and vacuum insulators, at the trade fair stand and was available to answer questions from trade fair visitors. Many customers emphasized the need for face-to-face fairs to exchange experiences. In particular, Jiri Klejch noticed an increasing interest in 3D-printed ceramic components.