Table 1: Film codes. The percentages are wt.-% of GGM.

Code Description GGM:5gox Film from GGM with 5% glyoxal GGM:5gox/10sor Film from GGM with 5% glyoxal and 10% sorbitol GGM:5gox/20sor Film from GGM with 5% glyoxal and 20% sorbitol GGM:5gox/30sor Film from GGM with 5% glyoxal and 30% sorbitol GGM:5gox/40sor Film from GGM with 5% glyoxal and 40% sorbitol GGM/40sor Film from GGM with 40% sorbitol