| 摘要 |
Oxide layers of aluminium or aluminium alloys are coloured with organic compounds by introducing at least one diazo compound into pores of the oxide layer and reacting the diazo compound to form a dye. Patterns, designs, labels, signs or pictures can for example be produced by irradiating the diazo compounds incorporated in the oxide layer. The articles thus produced may be used as sign-boards, front plates, scales, circuit diagrams, traffic signs, identity cards, etc. |
