Abstract: A novel lithographic printing plate suitable for use with inkjet printers as image forming devices and a method for making such a plate is disclosed.

Abstract: A lithographic printing plate and a method of preparing a lithographic printing plate is described which is suitable for use with inkjet printers for forming images, wherein the inkjet printers use a pigment based ink. A substrate having thickness of 50 to 400 microns is selected from a group of substrates consisting of a polymeric substrate, a paper substrate, a metal substrate, a fabric substrate and a laminate of a combination of the substrates. At least one layer of a hydrophilic lithographic coating is applied on an operative surface of the substrate. The coating is prepared by mixing together at least one hydrophilic binder, at least one cross-linking agent, at least one catalyst, at least one accelerator, at least one inorganic pigment, at least one surfactant and particulate silica having particle size between 1 to 15 microns and pore volume between 0.2 to 1.8 ml/gm. The layer typically has a thickness of at least 5 microns and at least one layer is applied.

Abstract: A method of preparation of a Lithographic Printing Plate comprising the steps of, selecting a substrate for making of the printing plate from a natural or synthetic polymeric sheet element material having a tensile strength in the range of 400 to 3000 Kgm/cm2 and thickness ranging from 75 microns to 250 microns; shrinking the said substrate to have shrinkage in the range of 0.2 to 2.0% by exposing the substrate to heat of temperatures ranging from 140 to 180 degrees Celsius for 8 to 12 minutes; subbing the substrate to alter the surface energy of the substrate; forming a hydrophilic lithographic coating by reacting a hydrophilic binder with a cross linking agent, an accelerator, at least one pigment, at least one cationic surfactant and particulate silica having micron size ranging between 1 to 5 microns and a pore volume ranging between 0.2 ml/gm to 1.