Our premium stockcards, whether black, coloured or white with black imprint, are manufactured in the well-known Prinz quality. This means that the card used for this is pH-neutral and the attached film strips are made of 100 μm polyester, absolutely free of plasticisers and acids. A special feature of our premium stockcards is the maximum possible clamping force for a strong hold of the stamps and documents. In addition, your stamps are completely covered by foil and are therefore optimally protected. Due to the plasticiserfree polyester film, a safe storage time can be guaranteed for many years. Post administrations and auction houses in particular prefer this type of storage cards.