| 摘要 |
A palladium plating solution, characterized in that it comprises a soluble palladium salt in an amount of 0.1 to 40.0 g/liter in terms of palladium, 0.01 to 10 g/liter of a pyridine-carboxylic acid and/or at least one selected from among a soluble iron salt, zinc salt, thallium salt and tellurium salt and the like in an amount of 0.002 to 1.0 g/liter in terms of metal, 0.005 to 10 g/liter of amine derivative of pyridine-carboxylic acid, an aldehydobenzoic acid derivative, and 0.001 to 1.2 g/liter of an anionic surfactant or an amphoteric surfactant. The palladium plating solution allows the preparation of a highly pure and stable palladium precipitate which is excellent in specular gloss, forms a plating film having a thickness of 5 žm or more and is free from the occurrence of a crack. |
