INKTJET PRINTING

The personal data, including a high quality colour photograph, is printed on the data page using a full colour inkjet engine. The inkjet heads print with a resolution of 720 dpi which results in a high quality picture. The inks used for printing, are cured by UV light. The inks are specially selected for printing on security paper used in passports. The inks penetrate the paper to a certain extend which forms a barrier against removal by abrasion and the ink cannot be washed out by using water or most solvents. Therefore removal is virtually impossible and attempts cause damage to the paper and the background security print and can set off tagents integrated in the paper which are sensitive to solvents. Due to the UV curing of the ink, the colours remain vivid when printed on normal passport paper. After UV curing the inks are completely dry and form a good basis for the lamination of the security foil.