Crude counterfeits like the supposed Franz Kafka of rosin (precious resin) or as a water pen betray themselves through faulty descriptions, ridiculous material specifications and cheap finishing but are easily recognisable through their price and look. Collectors agree that less obvious, high-quality reproduced counterfeits are the actual problem, since they approximate the original ever more. This development is observable in plagiarisms in many sectors, e.g. also in the automotive area.