Research On Ink-jet Printing Process Of The Leather

In this paper the processes of digital printing on the sheep grain and suede, blue sheepleather, and cattle split leather were studied. The printing processes were optimized by analyzingthe performance of the leather and evaluating the effect of printing.The process of digital printing using the reactive dye ink on white grain leather wasfollowed: overprinted with the modifier G(1:120)�'natural drying�'digital printing�'baking(140℃、2.5min)�'finishing with twice water-based resin(1:2). The dry and wet rubbingfastness were respectively4-5grade and5grade. The process of digital printing on suede wasfollowed: overprinted with the hydrophilic agent K82(1:2) twice�'natural drying�'digitalprinting. The dry and wet rubbing fastness were respectively4-5grade and3-4grade.The process of digital printing using the reactive dye ink on blue sheep leather was followed:overprinted with penetrating agent JFC(volume fraction is1.5%)�'natural drying�'digitalprinting�'finishing with water-based resin(1:2). The dry and wet rubbing fastness wererespectively4-5grade and4grade.The process of digital printing using the reactive dye ink on cattle split leather was followed:overprinted with hydrophilic agent K82(1:1)�'natural drying�'digital printing. The dry andwet rubbing fastness were respectively4grade and3grade.The process of digital printing using the pigment ink on white grain leather was followed:overprinted with penetrating agent JFC(volume fraction is1%)�'natural drying�'spraycrosslinker�'digital printing�'baking. During the process the open degree of the crosslinkingagent was10%, the baking temperature was120℃, the baking time was400s. The wet rubbingfastness of the printed leather was5grade, and the dry rubbing fastness could up grade to4by overprinted with oily nitrocellulose. After overprinted with the hydrophilic agent K82(1:1) once,the sheep suede was printed by the process as well as the sheep grain leather. The dry and wetrubbing fastness were respectively4grade and4-5grade.A and b values of the printed color pieces were closer to the actual a and b value of thecolor piece itself, the higher the K/S. In the case of one of the values unchanged, the anothervalue was closer to the actual value, the K/S value was higher.