	US 7,537,298 B2
	Printing apparatus, printing method, and program for black pigment and dye ink
Naomi Oshio, Kanagawa (Japan); Minoru Teshigawara, Kanagawa (Japan); Tetsuya Edamura, Kanagawa (Japan); Satoshi Seki, Kanagawa (Japan); and Kiichiro Takahashi, Kanagawa (Japan)
Assigned to Canon Kabushiki Kaisha, Tokyo (Japan)
Filed on Jul. 22, 2004, as Appl. No. 10/896,073.
Claims priority of application No. 2003-284382 (JP), filed on Jul. 31, 2003.
Prior Publication US 2005/0024401 A1, Feb. 03, 2005
Int. Cl. B41J 29/38 (2006.01)

U.S. Cl. 347—9 [347/14]

8 Claims

1. A printing apparatus capable of printing an image on a printing medium by using at least black pigment ink and black dye ink, the apparatus comprising:

a selecting unit that selects either a single side print mode in which one side of the printing medium is printed or a double side print mode in which both sides of the printing medium are printed; and

print control means that executes a process for printing by using a first amount of the black pigment ink without using the black dye ink based on black image data to express a predetermined density level when the single side print mode is selected by said selecting unit, and that executes a process for printing by using a second amount of the black pigment ink and a third amount of the black dye ink based on the black image data to express the predetermined density level when the double side print mode is selected by said selecting unit, the second amount being less than the first amount.