In order to analyze the connection between constitution and printing performance of black inkjet ink, experiments about printability by printing different black inks on different substrates were carried out. Making use of EpsonR230 piezoelectric inkjet, pigment type and dye type black ink were printed on various substrates (swellable photo paper, porous photo paper, coated off-set paper, PP, xuan paper,film) separately. Proliferation, infiltration and distribution of ink droplet on those substrates were observed with digital microscope. Samples' water fastness and light fastness were studied through the change of color density with corresponding experiments. Printability was evaluated subjectively. Considering ink constitution and substrates structure, comparison and analysis of printability with different black inks on substrates of diverse support body were investigated. The result indicates: Both black inks can reach high color density in the special-purpose photo paper, and acquire relatively clear writing picture edge, advanced water fastness and light fastness. On coated off-set paper and swellable paper, the performance of dye type is inferior to that of pigment type; Xuan paper reaches low density and shows minor difference between using two different inks.
