Heating magnetically orientable pigment in a printing process

Details Heating magnetically orientable pigment in a printing process Heating magnetically orientable pigment in a printing process

B - Operations, Transporting

41

F

B41F 17/00 (2006.01) B41F 3/36 (2006.01) B41F 19/00 (2006.01) B41M 3/14 (2006.01)

Patent

CA 2590018

A printing apparatus and method for aligning special effect flakes is disclosed. The flakes field orientable and have an absorption band of wavelengths and a reflection band of wavelengths and are dispersed within in a viscous paste-like ink. The absorption band of the flakes is more absorbing than reflecting and the reflecting band is more reflecting than absorbing. A laser diode array is provided for generating beams of light positioned to irradiate the paste-like ink coating on the substrate so as to lessening the viscosity of the paste like ink by irradiating with light. Preferably at least 45% of the optical power of the one or more beams of light is in the absorption band of the flakes. After the flakes are heated to lessen the viscosity of the ink, a magnetic field is applied so as to orient the flakes within the ink.

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