Environmental degradation of Modern non-balanced glasses

The authors acknowledge to Fernando Cortes (Cathedral of Canterbury) for supplying the glass samples and the Cathedral of Santa Maria Foundation of Vitoria-Gasteiz and Cervitrum research group (Institute of History, CSIC) for supporting the study of glass samples. Likewise, they acknowledge the partial financial support of the Fundacion General CSIC (ComFuturo Programme), and of the Portuguese Science Foundation (projects Pest‐OE/ EAT/UI0729/2011, Pest‐OE/EAT/UI0729/2014, and SFRH/ BD/84675/2012). The authors also wish to acknowledge professional support of the CSIC Interdisciplinary Thematic Platform Open Heritage: Research and Society (PTI-PAIS).