| 摘要 |
The grey coloration in the film is achieved by incorporating into the thermoplastic a mixture of a) white pigments and/or fillers having a white colour, b) 2 or more coloured organic pigments whose mixture has a grey to black colour. These grey films and composites of these films with other films have an inconspicuous appearance and a strong covering effect and are therefore particularly suitable for the production of forgery-proof articles, such as identity cards, cheque cards and credit cards. |
