International. Traditional ink that possesses harmful components has caused many problems, so a new paper developed edible chitosan-TiO2 inks and used it as a model to study the relationship between rheology and printing.
Rheological properties and corresponding adaptation were investigated. The ink developed exhibited non-Newtonian behavior, shear thinning behavior, and temperature-dependent properties. The voltage, frequency and cutting temperature had a big impact on the ink module. Low values of J(t) (compliance) reflected the strong structure of the material and the related final recovery rate reached 65.9%.
Based on the results of the adjustment, the screen printing simulation was further investigated for closer practical application. The recovery rate reached 55% with a high initial recovery coefficient (K3 = 10.7), indicating that the ink was recovered earlier to high viscosity after the shear was released and was suitable for printing. The ink was also printed on coated paper. The solidity was up to 91% and the scratch resistance achieved the H. The printing effect on the black cardboard and PET film was also excellent. Prepared edible ink provides a novel alternative to traditional ink and has great potential in the printing industry, especially in food.
Source: www.sciencedirect.com
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