Abstract
A study of crack patterns in laponite films of different thickness is presented. Two cracking regimes are observed. The earlier, with a higher rate of desiccation and shrinking, has predominantly 4-fold vertices in the crack network, while the later regime has less volume shrinking and forms mainly 3-fold vertices. The pattern shows a self-similarity under coarse-graining. The graph of the area covered by cracks versus minimum crack-width resolved, scales with the film thickness. Curves representing crack area for different thickness thus collapse onto a single curve.
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