Two UV-absorbers, Tinuvin P, 2-(2-hydroxy-.5-methyl-phenyl)-2H-benzotriazole and Tinuvin 320 (benzotriazole of unknown formula) were used as active agents in this work. These were added in several amounts in water-based disperse ink-jet inks. The surface tension, pH, viscosity and conductivity of the prepared formulations were monitored over a period of 90 days in order to estimate the ink stability and the compatibility of the UV-absorbers with the ink constituents. The inks were used for ink-jet printing of polyester polyamide and polyacrylonitrile samples. Fastness and colour properties of the samples were measured. Quantitative determination of the UV-absorbers extracted of the printed sample was also made.
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