This optical microscopy image shows the drying and cracking of a film formed when an aklyl ketene dimer (AKD) dispersion is deposited and dried on a glass microscope slide. AKD is a waxy material that is commonly used in industry to treat paper and reduce its water absorbance. This can improve the quality of inkjet printing by reducing the spread of ink drops. As part of an on-going European project in the Inkjet Research Centre we are studying the ability of AKD to change the wettability of a range of surfaces.
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