Hewlett-packard Development Company, L.p.

Jaime Fernández Del Rio

Jacint Humet Pous

Eduardo Amela Conesa

Maria Elizabeth Zapata

Marc Serra Vall

Marc Serra Vail

Marc Rossinyol Casals

Certain examples of printers and methods of printing may involve determining colorant amounts of image regions within a print image.

Printer

Methods performed by a printing system are described herein. A portion of a print area is located by operating an optical sensor to respond to a color shift. The color shift is from a printed reference color. The color shift is caused by a fixer fluid applied to the portion. Printing systems and tangible machine readable storage mediums are also described herein.

Printing systems and methods for operating printing systems

A method performed by a printing system is described herein. A request is provided to a user to enter data related to print quality of a mark or marks printed on a portion of a background region. The background region includes an area or areas treated with a fixer fluid applied by a printhead. A user input is received associated to the request. A misalignment of the printhead is estimated in accordance with the user input. A printing system and a tangible machine readable storage medium are also described herein.

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Calella Barcelona, Spain

Jaime Fernández Del Rio