发明名称 |
COLOUR LASER MARKING OF ARTICLES AND SECURITY DOCUMENTS PRECURSORS |
摘要 |
<p>A method of colour laser marking an article having a polymeric foil with at least one colourless layer containing an infrared absorber, a polymeric binder and a colour forming compound; including the steps of: - laser marking the colourless layer with an infrared laser using a first laser operation mode to generate a blue or cyan colour; and - laser marking the same colourless layer with an infrared laser using a second laser operation mode to generate a black colour, wherein the first laser operation mode applies less energy to the colourless layer than the second laser operation mode. Also disclosed is an article, such as a security document, including a polymeric foil and a colourless layer containing laser marked graphical data having a blue or cyan colour and laser marked information having a black colour</p> |
申请公布号 |
WO2012076493(A1) |
申请公布日期 |
2012.06.14 |
申请号 |
WO2011EP71842 |
申请日期 |
2011.12.06 |
申请人 |
AGFA-GEVAERT;CALLANT, PAUL;GEUENS, INGRID;WAUMANS, BART;VAN AERT, HUBERTUS |
发明人 |
CALLANT, PAUL;GEUENS, INGRID;WAUMANS, BART;VAN AERT, HUBERTUS |
分类号 |
B41M5/323;B41M3/14;B41M5/30;B41M5/327;B41M5/34 |
主分类号 |
B41M5/323 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|