About glass crizzling

Today we would like to share with you a new topic of our ongoing research within the GoGreen Conservation project!

Recently, our colleagues have focused on the analysis of cracking (crizzling) of historical glass using the acoustic emission technique.

Acoustic emission involves detecting and analyzing the sounds generated by materials as they undergo deformation (swelling) and damage. Our research objectives are twofold: firstly, to elucidate the underlying mechanisms governing crack initiation, propagation, and ultimate failure in historical glass replicas but also in archaeological glass samples. Secondly, to extrapolate meaningful insights into the material’s long-term durability and vulnerability to environmental stressors, thereby informing comprehensive conservation strategies.

The first results show that we can artificially age the archaeological glass replicas and the hydrated layer prone to crizzling is produced. When said hydrated layer dries, it crizzles, producing acoustic emission signals.

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