| PATENT CLAIMS |
Printing system having a printing mechanism for printing fast penetrating absorbing inks, the IMPROVEMENT comprising: a valve jet printing mechanism employing an aq waterfast fluorescent ink contg water, water soluble organic solvents, contg non purified dyes that have < 2,450 ppm concn of phosphates, 100,000 ppm concn of sulfates, < 500 ppm concn of nitrates, < 2 ppm concn fluoride, < 5 ppm concn of chloride, < 0.2 concn of bromide & < 0.1 ppm concn of iodine & a penetrating agent solvent system that contains isopropyl alc with inert surfactant
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