Response of soluble nylon to changes in relative humidity
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The environmental conditions at Hardham Church, particularly heating and ventilation—provide the activation mechanism for ongoing damage to the paintings. The dimensional response of the coating when exposed to environmental cycling was studied using time-lapse video microscopy. The recordings clearly demonstrated that the material undergoes rapid and extreme dimensional alteration, activated by RH changes. The coating film starts to contract at RH values below 70 %.
file://C:\gradoc\web\adrian\Soluble nylon response.mov