Farblasermarkierung

Details

Veröffentlichungs-Nr.

EP2719540

Aktenzeichen

EP12188143

Anmeldetag

11. Oktober 2012

Veröffentlichung

9. September 2015

Erteilung

9. September 2015

Rechtsraum

EP

IPC

B41M5/34B41M5/337

Abstract

A method for preparing a color laser marked article using three infrared lasers L-1, L-2 and L-3 having respectively a laser emission wavelength of »(L-1), »(L-2) and »(L-3) and comprising the steps of: - laser marking with the infrared laser L-1 a first color laser markable layer including an infrared dye IR-1 having an absorption maximum in the infrared region » max (IR-1); - laser marking with the infrared laser L-2 a second color laser markable layer including an infrared dye IR-2 having an absorption maximum in the infrared region » max (IR-2); - laser marking with the infrared laser L-3 a third color laser markable layer including an infrared dye IR-3 having an absorption maximum in the infrared region » max (IR-3); and - at least partially exposing the color laser markable article to light having a wavelength between 520 nm and 700 nm, wherein, the laser emission wavelengths satisfy the condition of: the infrared dye absorption maxima satisfy the condition of: and the light emitted by the infrared laser L-1 passes, in order, through the third and second color laser markable layer before exposing the first color laser markable layer.

Anmelder

Firma

AGFA-GEVAERT

Land

🇧🇪 Belgien

Fachgebiete