Relationships between Mechanical Properties and Performance of Inks as the Basis for Quality Control Techniques

摘要

Three different intaglio ink formulations have been examined to determine their mechanical properties. In all cases the properties share a strong shear rate and time dependence. In addition, the behaviors of the different formulations vary substantially at intermediate shear rates but are similar at the very high and very low shear rates that are seen on the printing press. Consequently, the shear behavior has importance for ink fabrication but does not explain the differences in printing performance that are seen for these formulations. The ink samples were then examined for the changes in mechanical properties that occur during drying (curing). Distinct differences in curing behavior are observed for the various formulations and it was determined that these differences can influence performance. It was also found that direct exposure to air (oxygen) will produce curing. The major implications of these results in terms of fabrication, quality control, and printing procedures are discussed.