image/svg+xml Coldstore Coolstore Exhib-ition -20 0 -10 10 20 30 Temperature Human comfortfor permanentoccupation 16 18 Visitor comfort 26 Risk of freezingin services 4 The container Moderately stable,Limited durabilityon display Unstable colour filmand photo Nitrocellulose, rosin alumpaper, many plastics Chemical stability Annual cycle forminimum energyuse for storage 8 16 Stiffness increases withdecreasing temperature,relatively suddenly at theglass transition temperature Gelatin > 60 -30 < rubber PVAc Polybutylmethacrylate PVC plasticised Mechanical stability Catastrophic phase change,but often metastable tin 13 Glauber'ssalt 32 water saturated 0