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Influence of some Process Variables on Shades in Inkjet-Decorated Tiles

A common problem in decorated ceramic tile manufacture is the difficulty of keeping the same shade in tiles from different lots.

In the case of inkjet-decorated tiles, the problem is more pronounced owing to the small particle size of the pigments used in the inks (<1 μm) and the tiny amount of deposited material (about 10 g ink/m2). These singular features of inkjet printing can cause little changes in the usual process or substrate variables in industrial production to lead to considerable changes in the resulting shade. This study examines the influence of some manufacturing process variables on the emergence of shades, with a view to determining which of these most affect the appearance of this problem, and which need to be focused on for control, by implementing the relevant corrective measures.


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