An
inkjet printing fluid composition comprising water, colorant, acrylic latex
polymer, and a
water dispersible polyurethane additive having an acid number greater than 50, preferably between 50 and 150, more preferably from 60 to 100, and most preferably from 60 to 90. The invention provides
inkjet printing fluid compositions, such as
pigment-based
inkjet printing inks, which contain an acrylic latex
polymer which provides increased
optical density for printed images, and a
water dispersible polyurethane additive that enables the latex-containing printing fluid to be recirculated for extended periods in a recirculating printing fluid printing
system without significant fluid destabilization or pressure build up or filter clogging. The invention further provides a method for printing an inkjet image comprising: I) providing an inkjet printing fluid according to the invention; and II) jetting the inkjet printing fluid in the form of ink drops onto a recording element to form a printed image.