Rub resistance of ink jet prints on laboratory substrates with wheat pulp

Each printing ink is formulated according to a specific printing technique in order to give the print a high degree of rub resistance to maintain equal quality during transport, storage and end use. Rub resistance is a very important parameter, which depends on the printing ink, printing substrate and printing conditions. In this paper, the rub resistance of laboratory substrates with variable content of wheat pulp printed with ink jet printing technique was analyzed. The ink jet printing technique is increasingly used for small print runs due to its variability and easy print preparation. Resistance to rubbing was evaluated according to BS 3110 standard on environmentally friendly laboratory substrates printed with magenta and cyan ink. The print stability was observed based on the color change of the prints shown through the Euclidean color difference. The analysis results showed greater rub resistance of prints on laboratory substrates with a lower share of wheat pulp with respect to all the analyzed samples. All samples printed with magenta ink show a higher degree of rub resistance than the samples printed with cyan ink.