X4 TIJ Cartridge is a dye ink formulated to produce beautiful, sharp printing with high scratch resistance even at low resolution settings on porous substrates, such as craft paper, corrugated paper, clay coated paper, wood and more. The High Density dye ink X4 offers excellent versatility.X4 is highly waterproof and exhibits excellent light fastness able to print on a wide range of porous materials (craft paper, clay-coated and wood etc.). No dryer is required to print at high speeds..