| 摘要 |
PCT No. PCT/EP96/04489 Sec. 371 Date Nov. 27, 1998 Sec. 102(e) Date Nov. 27, 1998 PCT Filed Oct. 16, 1996 PCT Pub. No. WO97/15452 PCT Pub. Date May 1, 1997A method of forming a mark on a substrate made of plastics material comprises the step of applying a basic solution to a surface portion having a prefixed pattern of the substrate. In a preferred embodiment, the basic solution is used in combination with at least one alkali-stable water-soluble polymer, to produce a viscous liquid composition, which is advantageously applicable to the substrate by means of pad-printing and silk-screen printing process.
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