The notification shall cover a fungicide, in particular for the preservation of library or archive material, which contains at least one active substance,dissolved in a solvent containing at least one penetrating agent,The active substances are compounds selected from: 4-hydroxy-2-methylquinoline, 4-chloro-3-methylquinoline, 5-bromo-8-hydroxy-7-carboxyquinoline. The solutions thus obtained are suitable for use by bathing, spraying, lubricating, tamponing or coating.